PIP401,118 - NXP Semiconductors / Philips Semiconductors

PIP401

OR-ing Intelligent Switch

Rev. 03 — 5 November 2002 Product data

VCC VRS

TFL GND

VOVI

003aaa198

1. Description

The PIP401 is an OR-ing Intelligent Switch (ORIS), a dedicated power OR-ing

device, that combines the simplicity of a diode with the efﬁciency of a MOSFET

switch.

The PIP401 will have optimum use in supply lines with up to 40 A loads. For higher

currents, two or more PIP401 devices can be used in parallel. The intended

application is parallel redundant power supply networks, where the PIP401 provides

a high-efﬁciency alternative to a rectiﬁer diode. When the input voltage is greater than

the output voltage, the PIP401 conducts with very low voltage drop. When the input

voltage drops below the output voltage, the PIP401 switches off very quickly, blocking

the ﬂow of reverse current. Remote sensing of the load voltage compensates for

inductance in the power supply lines. A thermal indicator is provided to allow power

supply shutdown or load reduction if the junction temperature exceeds 150 °C.

2. Features

■Very low voltage drop (typ 70 mV at 40 A)

■Controlled turn-on

■Fast turn-off

■Remote sensing

■Overtemperature ﬂag

■Low thermal resistance

■ESD protected

■Surface mount package.

3. Applications

■Compact PCI power supplies

■Telecommunications equipment power supplies

■High-reliability, parallel redundant power supply networks.

4. Ordering information

Table 1: Ordering information

Type number Package

Name Description Version

PIP401 D2-PAK (7 lead) Plastic, single-ended surface mount package (Philips version of

D2-PAK); 7 leads (centre lead cropped). SOT427

Philips Semiconductors PIP401

OR-ing Intelligent Switch

Product data Rev. 03 — 5 November 2002 2 of 16

5. Block diagram

6. Pinning information

7. Functional description

Figure 1 shows the block diagram of the PIP401, which contains the following

functional blocks:

•High-speed comparator with remote sense input

•Power switch driver stage

•Series power switch with very low on-state resistance

•Overtemperature detection circuit with open collector output.

Figure 2 shows the basic application circuit for the PIP401. The protected supply is

connected to VI. The output (VO) is connected to the system bus. An auxiliary supply

biases VCC. The remote sense input (VRS) is joined to VO at the load point.

Fig 1. Block diagram.

VCC

VCC IN

driver

power switch

comparator SOURCE

GATE

4, mb

6, 7

VRS

VCC

PIP401

GND

thermal flag

TFL

GND

03ah71

TOUT

Table 2: Pinning

Symbol Pin I/O Description Simpliﬁed outline Device symbol

TFL 1 O overtemperature ﬂag

SOT427

VCC 2 - positive supply voltage

GND 3 - ground

VO 4, mb O output

VRS 5 I remote sense

VI 6, 7 I input

MBL537

1234567

VCC VRS

TFL GND

VOVI

003aaa198

Philips Semiconductors PIP401

OR-ing Intelligent Switch

Product data Rev. 03 — 5 November 2002 3 of 16

The open-collector overtemperature ﬂag output (TFL) is fed back to the remote

shutdown input of the protected supply. In a parallel redundant system, there will be

at least one other protected supply feeding the system bus via another or-ing device.

7.1 Supply voltage

The PIP401 requires a supply voltage on VCC. The supply voltage must be at least

5 V greater than the voltage on VI in order to supply sufﬁcient drive voltage for the

series power switch. The maximum rated supply voltage is 20 V.

7.2 Voltage drop monitoring

7.2.1 Comparator

The comparator monitors the voltage between the input (VI) and the remote sense

input (VRS). When the voltage on VI is greater than the voltage on VRS by more than

a few millivolts, the comparator output goes HIGH, turning on the series power switch.

When the voltage on VI is less than the voltage on VRS, the series power switch is

turned off, blocking the ﬂow of reverse current between VO and VI.

7.2.2 Remote sense input

The remote sense input (VRS) provides a high impedance connection to the load,

bypassing the power supply line inductance. This connection enables the PIP401 to

respond immediately to voltage changes at the load, removing the effects of voltage

transients induced in the power supply line inductance due to changes in load

current.

(1) C1 allows operation for a short time after the auxiliary supply to VCC fails.

(2) D1 prevents reverse current ﬂow from VO into the auxiliary supply in the event of failure

of the auxiliary supply.

(3) R1 prevents charging of the input voltage due to current ﬂowing from VCC and out of VI.

(4) VRS should be connected to VO at the load point. Direct connection between VRS and

VO at the device pins should only be made if the distance between the PIP401 and the

load is very short, less than 25 mm.

Fig 2. Functional circuit diagram.

VCC VRS

GND

system bus

system bus ground

power supply shutdown

(open collector)

auxiliary supply

+20 V max

input voltage

from power supply

system

ground

03aj16

VOVI

(100 Ω typ)

(100 nF)

TFL

Philips Semiconductors PIP401

OR-ing Intelligent Switch

Product data Rev. 03 — 5 November 2002 4 of 16

7.3 Driver and series power switch

7.3.1 Soft turn-on

At switch on, the PIP401 turns on slowly to avoid current surges. These can cause

oscillations in the output voltage and may cause the protected power supply to shut

down. Typical turn-on time is 7 µs.

7.3.2 Low voltage drop

The on-state characteristic of the PIP401 is shown in Figure 5. In the on-state, the

PIP401 has very low voltage drop, typically 70 mV at 40 A, 25 °C. This produces a

power dissipation of 2.8 W. In comparison, a Schottky diode with a forward voltage

drop of 320 mV would have a power dissipation of 12.8 W.

7.3.3 Low current operation

At low current levels, the voltage drop is only a few millivolts. This makes it difﬁcult for

the comparator to determine when to switch off. The PIP401 overcomes this problem

by backing off the gate drive to the series power switch at current levels below 2 A.

The effect is to increase the resistance between VI and VO so that the voltage drop is

maintained at a constant level of approximately 6 mV. This is above the minimum

detectable threshold voltage of the comparator. This is shown in Figure 5 by the

ﬂattening of the curves at low current.

7.3.4 Fast turn-off with no reverse current

When the input voltage (VI) falls below the remote sense input voltage (VRS), the

PIP401 switches off very quickly, blocking the ﬂow of reverse current. Figure 3 shows

switching waveforms from an initial forward current of 20 A. Note the smooth ramp

down of current from 20 A with no reverse current ﬂow and minimum disruption of the

output voltage. Total turn-off time is less than 400 ns.

The gate drive circuit in the PIP401 is referenced to VI. When the input voltage is less

than the remote sense voltage, current ﬂows into VCC and out of VI. The maximum

current is 35 mA. In order to prevent charging of the output capacitors of the

protected supply connected to VI, a 100 W resistor should be connected between VI

and GND. This is shown as R1 in Figure 2.

Philips Semiconductors PIP401

OR-ing Intelligent Switch

Product data Rev. 03 — 5 November 2002 5 of 16

7.4 Overtemperature ﬂag

In the event of failure of the supply to VCC, the series power switch turns off and the

forward voltage drop increases from a few millivolts to approximately 0.7 V. The

power dissipation in the PIP401 increases causing the junction temperature to rise. A

temperature detection circuit with an open-collector output is provided, that can be

used to generate a warning signal for the power supply. The temperature ﬂag

operates at a typical junction temperature of 160 °C. A pull-up resistor of at least 1 kΩ

is required between TFL and VCC.

The temperature ﬂag is intended to operate under fault conditions. The PIP401

should not be run continuously at junction temperatures above 150 °C.

Fig 3. Turn-off waveforms.

Input voltage (VI)

Output current (IO)

(5A/ division)

Bus voltage (VO)

03aj18

Timebase

(100ns/ division)

Philips Semiconductors PIP401

OR-ing Intelligent Switch

Product data Rev. 03 — 5 November 2002 6 of 16

8. Limiting values

[1] Assumes a thermal resistance from junction to mounting base of 0.65 K/W.

[2] The PIP401 meets class 2 for Human Body Model and Machine Model (JEDEC).

Table 3: Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).All voltages measured with respect to GND.

Symbol Parameter Conditions Min Max Unit

VCC positive supply voltage −0.3 +20 V

VIinput voltage VO open circuit; VI ≤VCC −0.3 +20 V

VOoutput voltage VI = 0 V; VO≤VCC −0.3 +20 V

VVRS remote sense voltage VVRS ≤VCC −0.3 +20 V

VTFL temperature ﬂag voltage VTFL ≤VCC −0.3 +20 V

ITFL temperature ﬂag current - 20 mA

PTFL temperature ﬂag dissipation - 100 mW

II, IOcontinuous input or output current Tmb ≤136 °C[1] -75A

IOM peak output current tp≤10 µs - 400 A

Tstg storage temperature −55 +150 °C

Tjjunction temperature −40 +150 °C

Vesd electrostatic discharge voltage human body model; C = 100 pF;

R = 1500 Ω[2] - 2000 V

machine model; C = 200 pF;

R=10Ω; L = 0.75 µH- 200 V

Philips Semiconductors PIP401

OR-ing Intelligent Switch

Product data Rev. 03 — 5 November 2002 7 of 16

9. Thermal characteristics

9.1 Transient thermal impedance

Table 4: Thermal characteristics

Symbol Parameter Conditions Min Typ Max Unit

Rth(j-mb) thermal resistance from

junction to mounting base Figure 4 - 0.5 0.65 K/W

Rth(j-a) thermal resistance from

junction to ambient mounted on glass-epoxy

circuit board with 25 mm x

25 mm copper area under

mountingbase,thermalvias

and forced air cooling;

airﬂow = 0.8 ms-1

(150 LFM).

- 15 - K/W

mounted on glass-epoxy

circuit board with minimum

footprint area

- 50 - K/W

Fig 4. Transient thermal impedance from junction to mounting base as a function of pulse duration.

03af37

10-3

10-2

10-1

10-6 10-5 10-4 10-3 10-2 10-1 1 10

tp (s)

Zth(j-mb)

(K/W)

single pulse

δ = 0.5

0.2

0.1

0.05

0.02

δ =

Philips Semiconductors PIP401

OR-ing Intelligent Switch

Product data Rev. 03 — 5 November 2002 8 of 16

10. Characteristics

[1] When the input supply fails, the voltage on VI can fall to zero. However, the voltage on VRS must be at least 1.3 V for the comparator to

operate and turn off the series power switch.

[2] In the off-state, the majority of the supply current into VCC ﬂows out of VI.

[3] ∆VON =V

I-V

Table 5: Characteristics

=15V; V

= 5 V; VRS connected to VO;

−

≤

+150

C unless otherwise speciﬁed. All voltages measured with

respect to GND.

Symbol Parameter Conditions Min Typ Max Unit

VCC supply voltage VI + 5 15 20 V

VIinput voltage on-state; VI≥VVRS [1] 1.3 5 VCC −5V

VVRS remote sense voltage 0 5 VCC V

∆VON on-state voltage IO= 40 A; Tj=25°C;

Figure 5 -7080mV

VFoff-state forward voltage VCC =0V; I

O=40A;

Tj=25°C- 0.85 1 V

ICC supply current on-state; VO open circuit;

VI≥VVRS

- 3 10 mA

off-state; VO open circuit;

VI<V

VRS

[2] -1635mA

IIinput current on-state; VO open circuit;

0≤VI≤VCC

- 0.1 10 mA

off-state; VO open circuit;

0≤VI≤VCC

[2] −35 -16 - mA

IVRS remote sense current 0 ≤VI≤VCC −2 +0.1 +2 mA

TTFL ﬂag trip temperature - 160 - °C

ILR(VO) reverse leakage current into

VO VCC =0V; V

O=15V;

VI=0V - 10 500 nA

ton turn-on time VI=0Vto5V; I

O=5A 3 7 - µs

toff turn-off time VI=5Vto0V; I

O= 5 A 100 200 300 ns

Lsinternal source inductance - 2 - nH

Philips Semiconductors PIP401

OR-ing Intelligent Switch

Product data Rev. 03 — 5 November 2002 9 of 16

11. Application information

11.1 Parallel redundant operation

Figure 7 shows a typical parallel redundant power supply system. Two 5 V system

power supplies are connected via PIP401 devices to a shared load. An auxiliary

supply provides the PIP401 devices with 12 V. Power supplies with forced current

sharing capability are ideal for this application. The remote connection to each

PIP401 is taken from a point close to the load in order to compensate for the effects

VCC =15V; V

I=5V

(1) Tj= 125 °C

(2) Tj=25°C

(3) Tj=−40 °C

VCC = 15 V; VI=5V; I

O≥2A

Fig 5. On-state characteristic; typical values. Fig 6. Normalized on-state voltage drop factor as a

function of junction temperature.

03aj17

100

150

0 10203040

IO (A)

∆VON

(mV)

(1)

(2)

(3)

03af18

0.5

1.5

-60 0 60 120 180

Tj (°C)

a∆VON

∆VON 25°C()

------------------------------

Fig 7. PIP401 used in parallel redundant power supply network.

VCC VRS

GND

LOAD

03ah73

5 V

SUPPLY

12 V

AUXILIARY

SUPPLY

5 V

SUPPLY

cable

inductance

VOVI

TFL

VCC VRS

GND cable

inductance

VOVI

TFL

Philips Semiconductors PIP401

OR-ing Intelligent Switch

Product data Rev. 03 — 5 November 2002 10 of 16

of line inductance. The VRS connection may be connected directly to VO if the circuit

inductance is negligible. In general, this means that the distance between the PIP401

and the load must be less than 25 mm.

Assume that the 12 V supply to VCC is present but both 5 V supplies are off. In this

condition, with no voltage between input and output, both PIP401 devices will be off.

If one of the 5 V supplies is turned on, the comparator output in the associated

PIP401 will go HIGH, slowly turning on the series power switch (soft start). The series

power switch in the other PIP401 will remain off, preventing current from ﬂowing from

output to input.

If both 5 V supplies are on, and the power supplies have forced current sharing

capability, then both PIP401 devices will be on.

If the power supplies do not have forced current sharing capability then the supply

with the highest output voltage will tend to supply all the load current. If the difference

in output voltage is greater than a few millivolts, then the PIP401 device connected to

the power supply with the highest output voltage will be on, and the PIP401 device

connected to the power supply with the lowest output voltage will be off.

Remote voltage sensing is not usually a feature of this topology of parallel redundant

operation. This is because the remote sense lines provide an alternative path for fault

currents when one of the power supplies fails. Therefore, in order to maintain good

load regulation, the PIP401 must have a low forward voltage drop under normal

operating conditions. The typical on-state voltage drop of the PIP401 is 70 mV at

40 A. Two or more PIP401 devices may be connected in parallel in order to reduce

this further.

11.2 Fault condition

With reference to Figure 7, assume that both 5 V power supplies are supplying

current to the load. Assume that one of the supplies fails and its output voltage

collapses to zero. The voltage on the output terminal of the PIP401 drops from 5 V to

zero and goes slightly negative as the voltage across the line inductance reverses in

order to maintain current ﬂow.

At the instant that the power supply fails, the PIP401 detects that the voltage on VI is

less than the voltage on the remote sense connection VRS. The drive voltage to the

series power switch is immediately turned off, but the series power switch takes up to

a further 300 ns to switch off completely. During this delay time, the current

decreases from its initial value to zero at a rate determined by the bus voltage and the

line inductance.

If the PIP401 turns off completely before the current reaches zero, then there is no

reverse current ﬂow. On the other hand, if the rate of fall of current is very high,

current will ﬂow from VO to VI until the PIP401 turns off completely. The peak reverse

fault current depends on the magnitude of the line inductance and the initial load

current.

Philips Semiconductors PIP401

OR-ing Intelligent Switch

Product data Rev. 03 — 5 November 2002 11 of 16

11.3 Overtemperature detection

Figure 8 shows how the thermal ﬂag output of the PIP401 is used to shut down a

power supply in the event of overtemperature. In this circuit, there are pull-up

resistors from TFL to both the 5 V and 12 V supplies.

11.3.1 On-state

The overtemperature ﬂag can be used to detect excessive load current. The

overtemperature ﬂag will operate when the power dissipation due to load current is

sufﬁcient to raise the junction temperature to approximately 160 °C. The typical

on-state voltage of the PIP401 at 25 °C is 70 mV. To calculate the on-state voltage at

160 °C, the 25 °C value is multiplied by the normalized on-state voltage factor given

in Figure 6. This factor is 1.6 giving an on-state voltage at 160 °C of 112 mV. Using a

thermal resistance from junction to ambient of 15 K/W and an ambient temperature of

55 °C, the overtemperature ﬂag will operate when the current exceeds:

(1)

One possible use of the overtemperature ﬂag is to detect failure of the cooling fan, in

applications where forced air cooling is used.

If the thermal resistance from junction to ambient is higher, then the temperature ﬂag

will operate at a lower value of output current.

11.3.2 Off-state

If the 12 V supply to VCC fails as a result of a fault in the auxiliary supply, this will

cause the PIP401 to turn off, and the voltage drop to increase from a few millivolts to

approximately 0.7 V. The increased dissipation in the PIP401 will cause its junction

temperature to rise. Taking a junction to ambient thermal resistance of 15 K/W and an

ambient temperature of 55 °C, the overtemperature ﬂag will operate when the

dissipation in the PIP401 is greater than:

(2)

Fig 8. Overtemperature detection.

VCC VRS

GND

LOAD

03ah74

5 V

SUPPLY

shutdown

12 V

SUPPLY VOVI

2.2

kΩ

kΩTFL

IOTTFL Tamb

–

∆VON Rth j a–()

----------------------------------------- 160 55–

0.112 15×

------------------------- 62.5A===

Ptot 160 55–

---------------------7W==

Philips Semiconductors PIP401

OR-ing Intelligent Switch

Product data Rev. 03 — 5 November 2002 12 of 16

The voltage drop across the PIP401 in the off state is approximately 0.7 V. Therefore,

the overtemperature ﬂag will operate if the current through the PIP401 is greater than

10 A.

If the thermal resistance from junction to ambient is higher, then the temperature ﬂag

will operate at a lower value of output current.

Philips Semiconductors PIP401

OR-ing Intelligent Switch

Product data Rev. 03 — 5 November 2002 13 of 16

12. Package outline

Fig 9. SOT427 (D2-PAK).

REFERENCES

OUTLINE

VERSION EUROPEAN

PROJECTION ISSUE DATE

IEC JEDEC EIAJ

SOT427

0 2.5 5 mm

scale

Plastic single-ended surface mounted package (Philips version of D2-PAK);

7 leads (one lead cropped) SOT427

eeeeee

A1Lp

bc e

UNIT

DIMENSIONS (mm are the original dimensions)

mm 4.50

4.10 1.40

1.27 0.85

0.60 0.64

0.46 2.90

2.10

15.80

14.80

2.60

2.20

10.30

9.70

1.60

1.20 1.27

max.

mounting

base

99-06-25

01-04-18

Philips Semiconductors PIP401

OR-ing Intelligent Switch

Product data Rev. 03 — 5 November 2002 14 of 16

13. Revision history

Table 6: Revision history

Rev Date CPCN Description

03 20021105 - Product data (9397 750 10578)

Modiﬁcations:

•Typ and Max values of forward voltage VF changed in Table 5 and Section 7.3.2

•Graphic changed in Figure 5

•Typical on-state voltage drop of the ORIS changed in Section 11.1

•Flag operating temperature added to Table 5.

•Rth(j-a) with airﬂow added to Table 4.

•Block diagram changed Figure 1.

•Limiting values Table 3. Power dissipation (Ptot) rating removed. Minimum voltage ratings

changed from -0.5 V to -0.3 V. Normalized power dissipation and normalized output

current ﬁgures removed.

•Characteristics: Off-state characteristic curve removed.

02 20020828 - Product data (9397 750 10157)

Modiﬁcations:

•Speciﬁcation status changed from “Objective data” to “Product data”

•Typ and Max values of forward voltage VF changed in Table 5 and Section 7.3.2

•Graphic changed in Figure 5

•Typical on-state voltage drop of the ORIS changed in Section 11.1

01 20020621 - Objective data (9397 750 09971)

9397 750 10578

Philips Semiconductors PIP401

OR-ing Intelligent Switch

Product data Rev. 03 — 5 November 2002 15 of 16

9397 750 10578

Philips Semiconductors PIP401

OR-ing Intelligent Switch

Product data Rev. 03 — 5 November 2002 15 of 16

Contact information

For additional information, please visit http://www.semiconductors.philips.com.

For sales ofﬁce addresses, send e-mail to: sales.addresses@www.semiconductors.philips.com.Fax: +31 40 27 24825

14. Data sheet status

[1] Please consult the most recently issued data sheet before initiating or completing a design.

[2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at

URL http://www.semiconductors.philips.com.

[3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.

15. Deﬁnitions

Short-form speciﬁcation — The data in a short-form speciﬁcation is

extracted from a full data sheet with the same type number and title. For

detailed information see the relevant data sheet or data handbook.

Limiting values deﬁnition — Limiting values given are in accordance with

the Absolute Maximum Rating System (IEC 60134). Stress above one or

more of the limiting values may cause permanent damage to the device.

These are stress ratings only and operation of the device at these or at any

other conditions above those given in the Characteristics sections of the

speciﬁcation is not implied. Exposure to limiting values for extended periods

may affect device reliability.

Application information — Applications that are described herein for any

of these products are for illustrative purposes only. Philips Semiconductors

make no representation or warranty that such applications will be suitable for

the speciﬁed use without further testing or modiﬁcation.

16. Disclaimers

Life support — These products are not designed for use in life support

appliances, devices, or systems where malfunction of these products can

reasonably be expected to result in personal injury. Philips Semiconductors

customers using or selling these products for use in such applications do so

at their own risk and agree to fully indemnify Philips Semiconductors for any

damages resulting from such application.

Right to make changes — Philips Semiconductors reserves the right to

make changes in the products - including circuits, standard cells, and/or

software - described or contained herein in order to improve design and/or

performance. When the product is in full production (status ‘Production’),

relevant changes will be communicated via a Customer Product/Process

Change Notiﬁcation (CPCN). Philips Semiconductors assumes no

responsibility or liability for the use of any of these products, conveys no

licence or title under any patent, copyright, or mask work right to these

products, and makes no representations or warranties that these products are

free from patent, copyright, or mask work right infringement, unless otherwise

speciﬁed.

Level Data sheet status[1] Product status[2][3] Deﬁnition

I Objective data Development This data sheet contains data from the objective speciﬁcation for product development. Philips

Semiconductors reserves the right to change the speciﬁcation in any manner without notice.

II Preliminary data Qualiﬁcation This data sheetcontains data from the preliminary speciﬁcation. Supplementary data will be published

at a later date. Philips Semiconductors reserves the right to change the speciﬁcation without notice, in

order to improve the design and supply the best possible product.

III Product data Production This data sheet contains data from the product speciﬁcation. Philips Semiconductors reserves the

right to make changes at any time in order to improve the design, manufacturing and supply. Relevant

changes will be communicated via a Customer Product/Process Change Notiﬁcation (CPCN).

© Koninklijke Philips Electronics N.V. 2002.
Printed in The Netherlands
All rights are reserved. Reproduction in whole or in part is prohibited without the prior
written consent of the copyright owner.
The information presented in this document does not form part of any quotation or
contract, is believed to be accurate and reliable and may be changed without notice. No
liability will be accepted by the publisher for any consequence of its use. Publication
thereof does not convey nor imply any license under patent- or other industrial or
intellectual property rights.
Date of release: 5 November 2002 Document order number: 9397 750 10578
Contents
Philips Semiconductors PIP401
OR-ing Intelligent Switch
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1
Ordering information. . . . . . . . . . . . . . . . . . . . .  1
Block diagram  . . . . . . . . . . . . . . . . . . . . . . . . . .  2
Pinning information. . . . . . . . . . . . . . . . . . . . . .  2
Functional description  . . . . . . . . . . . . . . . . . . .  2
1 Supply voltage . . . . . . . . . . . . . . . . . . . . . . . . .  3
2 Voltage drop monitoring . . . . . . . . . . . . . . . . . .  3
2.1 Comparator. . . . . . . . . . . . . . . . . . . . . . . . . . . .  3
2.2 Remote sense input . . . . . . . . . . . . . . . . . . . . .  3
3 Driver and series power switch. . . . . . . . . . . . .  4
3.1 Soft turn-on. . . . . . . . . . . . . . . . . . . . . . . . . . . .  4
3.2 Low voltage drop  . . . . . . . . . . . . . . . . . . . . . . .  4
3.3 Low current operation. . . . . . . . . . . . . . . . . . . .  4
3.4 Fast turn-off with no reverse current. . . . . . . . .  4
4 Overtemperature ﬂag . . . . . . . . . . . . . . . . . . . .  5
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . .  6
Thermal characteristics. . . . . . . . . . . . . . . . . . .  7
1 Transient thermal impedance . . . . . . . . . . . . . .  7
Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . .  8
Application information. . . . . . . . . . . . . . . . . . .  9
1 Parallel redundant operation. . . . . . . . . . . . . . .  9
2 Fault condition. . . . . . . . . . . . . . . . . . . . . . . . .  10
3 Overtemperature detection. . . . . . . . . . . . . . .  11
3.1 On-state . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
3.2 Off-state . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
Package outline . . . . . . . . . . . . . . . . . . . . . . . .  13
Revision history. . . . . . . . . . . . . . . . . . . . . . . .  14
Data sheet status. . . . . . . . . . . . . . . . . . . . . . .  15
Deﬁnitions  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15
Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . .  15