MAX14562EXT+T - Maxim Integrated

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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

MAX14562

36V-Capable Overvoltage Protector with

Regulated Output Voltage

19-5570; Rev 1; 8/11

General Description

The MAX14562 protects valuable consumer circuits

against voltage faults of up to +36V. This robust protec-

tion is implemented in a three-step scheme for a superior

result. If the input is below the preset regulated output-

voltage (VPROV) threshold, the output tracks the input

minus the voltage drop (RON x ILOAD) across the pass

FET. If the input exceeds VPROV, the output is regulated

to VPROV. If the input rises further and exceeds the over-

voltage lockout cutoff threshold (VOVLO), the output is

disconnected from the input.

A low resistance 160mI (typ) FET is integrated in the

MAX14562, effectively reducing the component count

and application footprint. The MAX14562 also features

thermal shutdown protection against a short-circuit

event.

The MAX14562 is specified over the extended -40NC to

+85NC temperature range and is available in 8-pin TDFN

(2mm x 2mm) package.

Applications

Features

S Input Voltage Protection Up to +36V

S Preset Regulated Output Voltage (+5.15V typ)

S Integrated 160mI (typ) N-Channel MOSFET

Switch

S Soft-Start to Minimize In-Rush Current

S Overvoltage Cutoff Protection +8V (typ)

S Thermal Shutdown Protection

S -40NC to +85NC Operating Temperature Range

Ordering Information

+Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

*EP = Exposed pad.

Mobile Phones

Smartphones

Portable Media Player

PDAs

Digital Cameras

Bluetooth Headset

E-Book

Mobile Internet Device

Typical Operating Circuit

PART TEMP

RANGE

PIN-

PACKAGE

TOP

MARK

MAX14562ETA+T -40NC to

+85NC8 TDFN-EP* ADI

MAX14562

* *

OUT

ACOK

OUT

GND

10kΩ

1µF 1µF

TRAVEL

ADAPTER

INPUT

GND

VBUS

*ONLY TDFN.

VIO

CHARGER

INPUT SYSTEM LOAD

CHARGER

OUTPUT

PMIC

VBUS

APIC WITH

HS USB

MAX14562

36V-Capable Overvoltage Protector with

Regulated Output Voltage

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability.

(Voltages referenced to GND.)

IN .......................................................................... -0.3V to +40V

OUT ........................................................................ -0.3V to +6V

EN, ACOK .............................................................. -0.3V to +6V

Continuous Current Through IN/OUT

8-Pin TDFN .................................................................... Q1.6A

10ms Current Through IN/OUT

8-Pin TDFN ....................................................................... Q2A

Continuous Power Dissipation (TA = +70oC):

8-Pin TDFN (derate 11.9mW/NC above +70NC) ..........953mW

Operating Temperature Range ......................... -40NC to +85NC

Storage Temperature Range .......................... -65NC to +150NC

Junction Temperature .....................................................+150NC

Lead Temperature (soldering, 10s) ...............................+300NC

Soldering Temperature (reflow) .....................................+260NC

ELECTRICAL CHARACTERISTICS

(VIN = +2.2V to +36V, TA = -40NC to +85NC, unless otherwise noted. Typical values are at VIN = +5.0V and TA = +25NC.) (Note 2)

ABSOLUTE MAXIMUM RATINGS

TDFN

Junction-to-Ambient Thermal Resistance (BJA) ...... 83.9NC/W

Junction-to-Case Thermal Resistance (BJC) .............. 37NC/W

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-

layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.

PACKAGE THERMAL CHARACTERISTICS (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Input Voltage VIN 2.2 36 V

Preset Regulated Output Voltage VPROV

IOUT = 0mA, VIN = 6.5V 4.85 5.15 5.45

VIOUT = 200mA, VIN = 6.5V 4.75 5.15 5.45

IOUT = 800mA, VIN = 6V (Note 3) 4.75 5.15 5.45

Output Voltage VOUT IOUT = 0mA VIN > VPROV VPROV V

VIN < VPROV (Note 4) VIN V

Overvoltage Lockout Cutoff

Threshold Rising VOVLO IN rising 7.44 8 8.56 V

Overvoltage Lockout Hysteresis % of typ VOVLO 1 %

Input Supply Current IIN

EN = low, VIN = 4.5V, IOUT = 0mA 120 260 FA

EN = low, VIN = 7V, IOUT = 0mA 300 550

Input Shutdown Current IIN_Q EN = high, VIN = 3V 2.5 5 FA

OUT Shutdown Current VIN = 5V, VOUT = 4V, EN = high -1 +1 FA

On-Resistance RON VIN = 4.75V, IOUT = 100mA 280 mI

LDO Load Capacitance IOUT up to 0.8A 10 FF

DIGITAL SIGNALS (EN, ACOK)

EN Input High Voltage VIH 1.4 V

EN Input Low Voltage VIL 0.4 V

EN Input Leakage Current ILEAK VEN = 0V or 5.5V -150 +150 nA

ACOK Output Low Voltage VOL VIO = 3.3V, ISINK = 1mA (see Typical

Operating Circuit)0.4 V

ACOK Leakage Current VIO = 3.3V, ACOK deasserted (see Typical

Operating Circuit)-200 +200 nA

MAX14562

36V-Capable Overvoltage Protector with

Regulated Output Voltage

ELECTRICAL CHARACTERISTICS (continued)

(VIN = +2.2V to +36V, TA = -40NC to +85NC, unless otherwise noted. Typical values are at VIN = +5.0V and TA = +25NC.) (Note 2)

Note 2: All devices are 100% production tested at TA = +25NC. Limits over the operating temperature range are guaranteed by

design and not production tested.

Note 3: Thermally limited, guaranteed by design, and not production tested.

Note 4: In linear mode, as IOUT increases, the OUT voltage drops due to a voltage across Q1 (see Functional Diagram).

Note 5: All timing characteristics are measured using 20% and 80% levels unless otherwise specified.

Figure 1. Enable/Select Time

VOVLO

VPROV

MIN

tDEB

tACOK tACOK tDEB

tON tON

tOFF tDEB

tDEB

OUT

IOUT

ACOK

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

TIMING CHARACTERISTICS (Note 4)

Input Debounce Time tDEB VIN_MIN < VIN < VOVLO until charge pump

turns on, see Figure 1 10 20 35 ms

ACOK Time tACOK VIN_MIN < VIN < VOVLO to ACOK low until

charge pump turns on, see Figure 1 20 40 70 ms

Turn-on Time During Soft-Start tON RLOAD = 100I, CLOAD = 1FF, VOUT =

20% of VIN to 80% of VIN, see Figure 1 48 Fs

Overvoltage Turn-Off Time tOFF VIN > VOVLO to VOUT = 80% of VPROV,

RLOAD = 100I, see Figure 1 1Fs

THERMAL PROTECTION

Thermal Shutdown TSHDN 150 NC

Thermal Hysteresis THYST 20 NC

MAX14562

36V-Capable Overvoltage Protector with

Regulated Output Voltage

Typical Operating Characteristics

(CIN = 1µF, COUT = 4.7µF, TA = +25°C, unless otherwise noted.)

VOVLO vs. TEMPERATURE

MAX14562 toc08

TEMPERATURE (°C)

VOVLO (V)

603510-15

7.85

7.90

7.95

8.00

7.80

-40 85

NORMALIZED DEBOUNCE TIME

vs. TEMPERATURE

MAX14562 toc07

TEMPERATURE (°C)

NORMALIZED DEBOUNCE TIME

6035-15 10

0.85

0.90

0.95

1.00

1.10

1.05

1.15

1.20

0.80

-40 85

VIN = 5V

IOUT = 100mA

OUT VOLTAGE vs. IN VOLTAGE

MAX14562 toc06

IN VOLTAGE (V)

OUT VOLTAGE (V)

302010

0 40

IOUT = 100mA

VPROV vs. TEMPERATURE

MAX14562 toc05

TEMPERATURE (°C)

VPROV (V)

603510-15

5.12

5.14

5.16

5.18

5.20

5.10

-40 85

VIN = 6V

IOUT = 100mA

NORMALIZED ON-RESISTANCE

vs. TEMPERATURE

MAX14562 toc04

TEMPERATURE (°C)

NORMALIZED ON-RESISTANCE

6035-15 10

0.7

0.8

0.9

1.0

1.2

1.1

1.3

1.4

0.6

-40 85

IOUT = 100mA

EACH VIN CURVE IS NORMALIZED

INDEPENDENTLY AT 25°C

VIN = 3V

VIN = 4.2V

NORMALIZED ON-RESISTANCE

vs. SUPPLY VOLTAGE

MAX14562 toc03

SUPPLY VOLTAGE (V)

NORMALIZED ON-RESISTANCE

5.04.53.5 4.03.02.5

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6

0.6

2.0 5.5

IOUT = 100mA

LDO ABOVE 5.15V

IN SUPPLY CURRENT vs. TEMPERATURE

MAX14562 toc02

TEMPERATURE (°C)

IN SUPPLY CURRENT (µA)

603510-15

100

120

140

160

180

200

-40 85

VEN = 0V

VIN = 5V

VIN = 2.2V

IN SUPPLY CURRENT vs. IN VOLTAGE

MAX14562 toc01

IN VOLTAGE (V)

IN SUPPLY CURRENT (µA)

302010

100

150

200

250

300

0 40

VEN = 0V

MAX14562

36V-Capable Overvoltage Protector with

Regulated Output Voltage

Typical Operating Characteristics (continued)

(CIN = 1µF, COUT = 4.7µF, TA = +25°C, unless otherwise noted.)

SWITCH TURN-OFF TIME RESPONSE

(RLOAD = 100Ω)

MAX14562 toc14

2ms/div

3.3V

5V/div

OUT

5V/div

ACOK

5V/div

SWITCH TURN-ON TIME RESPONSE

(RLOAD = 100Ω)

MAX14562 toc13

10ms/div

3.3V

5V/div

OUT

5V/div

ACOK

5V/div

LOAD TRANSIENT

(VEN = 0V)

MAX14562 toc12

200ns/div

5V/div

OUT

5V/div

IOUT

500mA/div

ACOK

5V/div

800mA

10mA

LOAD TRANSIENT

(VEN = 0V)

MAX14562 toc11

200ns/div

5V/div

OUT

5V/div

IOUT

500mA/div

ACOK

5V/div

800mA

10mA

IN FALL TRANSIENT RESPONSE

(IOUT = 10mA)

MAX14562 toc10

250µs/div

6V IN

5V/div

OUT

5V/div

ACOK

5V/div

VPROV

IN RISE TRANSIENT RESPONSE

(IOUT = 10mA)

MAX14562 toc09

250µs/div

6V IN

5V/div

OUT

5V/div

ACOK

5V/div

VPROV

MAX14562

36V-Capable Overvoltage Protector with

Regulated Output Voltage

Typical Operating Characteristics (continued)

(CIN = 1µF, COUT = 4.7µF, TA = +25°C, unless otherwise noted.)

OUT SHORT SHUTDOWN

(THERMAL)

MAX14562 toc18

20ms/div

2.5A

5V/div

OUT

2V/div

ACOK

5V/div

IOUT

1A/div

ACOK RESPONSE (OVERVOLTAGE CONDITION)

(RLOAD = 50Ω)

MAX14562 toc17

10ms/div

12V

100mA

5V/div

OUT

5V/div

ACOK

5V/div

IOUT

100mA/div

POWER-UP RESPONSE

(CLOAD = 470µF)

MAX14562 toc16

10ms/div

3.3V

5V/div

OUT

5V/div

ACOK

5V/div

POWER-UP RESPONSE

(CLOAD = 470µF)

MAX14562 toc15

10ms/div

3.3V

5V/div

OUT

5V/div

ACOK

5V/div

MAX14562

36V-Capable Overvoltage Protector with

Regulated Output Voltage

Pin Configuration

Pin Description

3 4

8 6 5

OUT ACOK GND

OUT

*CONNECT EXPOSED PAD TO GND.

*EP

EN N.C.IN

TDFN

(2mm × 2mm)

TOP VIEW

MAX14562

PIN NAME FUNCTION

1,2 IN

Overvoltage Protection Input. Bypass IN with a 1FF ceramic capacitor to get Q15kV HBM ESD

protection. No capacitor is required for ±2kV HBM ESD protection. Externally connect both IN

pins together.

3EN Active-Low Enable Input. Drive EN low to turn on the device. Drive EN high to turn off the device.

4 N.C. No Connection. Not internally connected.

5 GND Ground

6ACOK

Open-Drain Flag Output. ACOK is driven low after input voltage is stable between minimum VIN

and VOVLO after soft-start time (double of debounce time). Connect a pullup resistor from ACOK

to the logic I/O voltage of the host system.

7,8 OUT Overvoltage Protection Output. Bypass OUT with a 1FF or larger ceramic capacitor (see Table 1).

Externally connect both OUT pins together.

— EP Exposed Pad. Connect EP to GND.

MAX14562

36V-Capable Overvoltage Protector with

Regulated Output Voltage

Detailed Description

The MAX14562 features the overvoltage protection to

the charger input VBUS line when a travel adapter (TA) is

used. In addition, the MAX14562 features a low 160mI

(typ) on-resistance internal FET (Q1) and protects the

low-voltage system against voltage faults up to +36V.

The MAX14562 features three-step overvoltage pro-

tection. When the input is below the preset regulated

output-voltage (VPROV) threshold, the output follows

the input minus the voltage drop across the pass FET

(RON x ILOAD). When the input exceeds VPROV, the

output is regulated to VPROV. If the input rises further

and exceeds the overvoltage lockout cutoff (VOVLO)

threshold, the output is disconnected from the input. The

MAX14562 also features thermal shutdown protection

against short-circuit events.

Soft-Start

To minimize inrush current, the MAX14562 features a

soft-start capability to slowly turn on Q1.

Soft-start function permits the device to charge the load

capacitor up to 1000FF by controlled current. The soft-

start is initiated when the debounce time ends (OUT

starts charging) and ends when ACOK is asserted low,

15ms (typ).

Linear Mode

When the input voltage exceeds the minimum IN volt-

age but is below VPROV, OUT follows IN with a minimum

voltage drop (RON x ILOAD) across pass FET after the

debounce time, tDEB, and ACOK is asserted.

The LDO mode needs a capacitor on OUT. The recom-

mended value is 10FF for load currents up to 800mA

(Table 1).

Preset Regulated Output-Voltage Mode

(PROV)

When IN goes above the preset regulated output voltage

(VPROV), Q1 provides a constant voltage of VPROV at

OUT, and ACOK is asserted.

Functional Diagram

Table 1. Recommended Load Capacitance

MAX14562

TIMING

AND

CONTROL LOGIC

VBG

INOVLO

OK EN

ACOK

OUTIN

POK

PROTECTIONHV CP

PROV CONTROL

OVLO CONTROL

LOAD CURRENT (mA) LOAD CAP (µF)

10 1

50 2.2

100 4.7

800 10

MAX14562

36V-Capable Overvoltage Protector with

Regulated Output Voltage

Overvoltage Lockout Mode (OVLO)

When IN goes above the overvoltage lockout threshold

(VOVLO), OUT is disconnected from IN and ACOK is

deasserted. Power dissipation increases when the input

goes higher than VPROV. The overvoltage lockout thresh-

old is set to further the power dissipation. When IN drops

below VOVLO, the debounce time starts counting. After

the debounce time (2 x tDEB), OUT follows IN again and

ACOK is asserted.

Thermal Shutdown

The MAX14562 features a thermal shutdown function

necessary to protect the device. The device turns off

and ACOK is deasserted when the junction temperature

exceeds +150NC (typ). When the temperature drops

20NC (typ) below 150NC (typ), the device turns back on

and Q1 is turned on after the debounce time.

Applications Information

Power-Supply Decoupling

Bypass IN pin(s) to ground with a 1FF or larger ceramic

capacitor placed as close as possible to the device.

Chip Information

PROCESS: BiCMOS

Package Information

For the latest package outline information and land patterns,

go to www.maxim-ic.com/packages. Note that a “+”, “#”, or

“-“ in the package code indicates RoHS status only. Package

drawings may show a different suffix character, but the drawing

pertains to the package regardless of RoHS status.

PACKAGE

TYPE

PACKAGE

CODE

OUTPUT

NO.

LAND

PATTERN NO.

8 TDFN-EP T822+1 21-0168 90-0064

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.

Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical

Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.

10 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

MAX14562

36V-Capable Overvoltage Protector with

Regulated Output Voltage

Revision History

REVISION

NUMBER

REVISION

DATE DESCRIPTION PAGES

CHANGED

0 9/10 Initial release —

1 8/11 Removed SC70 pin information from data sheet. Added additional conditions to

Preset Regulated Output Voltage parameter in the Electrical Characteristics table 1, 2, 3, 7, 9