AMS1508CM-30 - Advanced Monolithic Systems

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

Advanced AMS1508

Monolithic 8A LOW DROPOUT VOLTAGE REGULATOR

Systems

FEATURES APPLICATIONS

•• Adjustable or Fixed Output •• High Current Regulators

1.5V, 2.5V, 2.85V, 3.0V, 3.3V, 3.5V and 5.0V •• Post Regulators for Switching Supplies

•• Output Current of 8A •• Microprocessor Supply

•• Low Dropout, 500mV at 8A Output Current •• Adjustable Power Supply

•• Fast Transient Response •• Notebook/Personal Computer Supplies

•• Remote Sense

GENERAL DESCRIPTION

The

The AMS1508 series of adjustable and fixed low dropout voltage regulators are designed to provide 8A output current to

power the new generation of microprocessors. The dropout voltage of the device is 100mV at light loads and rising to 500mV

at maximum output current. A second low current input voltage 1V or greater then the output voltage is required to achieve

this dropout. The AMS1508 can also be used as a single supply device.

New features have been added to the AMS1508: a remote Sense pin is brought out virtually eliminating output voltage

variations due to load changes. The typical load regulation, measured at the Sense pin, for a load current step of 100mA to 8A

is less than 1mV.

The AMS1508 series has fast transient response. The Adjust pin is brought out on fixed devices. To further improve the

transient response the addition of a small capacitor on the Adjust pin is recommended.

The AMS1508 series are ideal for generating processor supplies of 2V to 3V on motherboards where both 5V and 3.3V

supplies are available.

The AMS1508 devices are offered in 5 lead TO-220 and TO-263 (plastic DD) packages and in the 7 lead TO-220 package.

ORDERING INFORMATION: PIN CONNECTIONS

PACKAGE TYPE OPERATING JUNCTION

5 LEAD TO-263 5 LEAD TO-220 7 LEAD TO-220 TEMPERATURE RANGE

AMS1508CM AMS1508CT AMS1508CT-1.5 0 to 125° C

AMS1508CM-1.5 AMS1508CT-1.5 AMS1508CT-2.5 0 to 125° C

AMS1508CM-2.5 AMS1508CT-2.5 AMS1508CT-2.85 0 to 125° C

AMS1508CM-2.85 AMS1508CT-2.85 AMS1508CT-3.0 0 to 125° C

AMS1508CM-3.0 AMS1508CT-3.0 AMS1508CT-3.3 0 to 125° C

AMS1508CM-3.3 AMS1508CT-3.3 AMS1508CT-3.5 0 to 125° C

AMS1508CM-3.5 AMS1508CT-3.5 AMS1508CT-5.0 0 to 125° C

AMS1508CM-5.0 AMS1508CT-5.0 0 to 125° C

VPOWER

VCONTROL

OUTPUT

ADJUST/GND

SENSE

FRONT VIEW

5 LEAD TO-220

Vpower

ADJUST

OUTPUT

Vcontrol

GND

SENSE

7 LEAD TO-220

FRONT VIEW

Vpower

Vcontrol

OUTPUT

ADJUST/GND

SENSE

FRONT VIEW

5 LEAD TO-263

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS1508

ABSOLUTE MAXIMUM RATINGS (Note 1)

VPOWER Input Voltage 7V Soldering information

VCONTROL Input Voltage 13V Lead Temperature (10 sec) 300°C

Operating

Junction Temperature Range

Thermal Resistance

Control Section 0°C to 125°C TO-220 package ϕ

= 50°C/W

Power Transistor 0°C to 150°C TO-263 package ϕ

= 30°C/W*

Storage temperature - 65°C to +150°C* With package soldering to 0.5in

copper area over backside ground

plane or internal power plane ϕ JA can vary from 20°C/W to >40°C/W

depending on mounting technique.

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at ILOAD = 0 mA, and TJ = +25°C unless otherwise specified.

Parameter Device Conditions Min Typ Max Units

Reference Voltage AMS1508 VCONTROL = 2.75V, VPOWER =2V, ILOAD = 10mA

VCONTROL = 2.7V to 12V, VPOWER =3.3V to 5.5V,

ILOAD = 10mA to 8A

1.243

1.237 1.250

1.250 1.258

1.263 V

Output Voltage AMS1508-1.5 VCONTROL = 4V, VPOWER =2.V, ILOAD = 0mA

VCONTROL = 3V, VPOWER =2.3V, ILOAD = 0mA to 8A 1.491

1.485 1.500

1.500 1.509

1.515 V

AMS1508-2.5 VCONTROL = 5V, VPOWER =3.3V, ILOAD = 0mA

VCONTROL = 4V, VPOWER =3.3V, ILOAD = 0mA to 8A 2.485

2.475 2.500

2.500 2.515

2.525 V

AMS1508-2.85 VCONTROL = 5.35V, VPOWER =3.35V, ILOAD = 0mA

VCONTROL = 4.4V, VPOWER =3.7V, ILOAD = 0mA to 8A 2.821

2.833 2.850

2.850 2.879

2.867 V

AMS1508-3.0 VCONTROL = 5.5V, VPOWER =3.5V, ILOAD = 0mA

VCONTROL = 4.5V, VPOWER =3.8V, ILOAD = 0mA to 8A 2.982

2.970 3.000

3.000 3.018

3.030 V

AMS1508-3.3 VCONTROL = 5.8V, VPOWER =3.8V, ILOAD = 0mA

VCONTROL = 4.8V, VPOWER =4.1V, ILOAD = 0mA to 8A 3.280

3.235 3.300

3.300 3.320

3.333 V

AMS1508-3.5 VCONTROL = 6V, VPOWER =4V, ILOAD = 0mA

VCONTROL = 5V, VPOWER =4.3V, ILOAD = 0mA to 8A 3.479

3.430 3.500

3.500 3.521

3.535 V

AMS1508-5.0 VCONTROL = 7.5V, VPOWER =5.5V, ILOAD = 0mA

VCONTROL = 6.5V, VPOWER =5.8V, ILOAD = 0mA to 8A 4.930

4.950 5.000

5.000 5.030

5.050 V

Line Regulation AMS1508/-1.5/-2.5/-2.85/

-3.0/-3.3/-3.5/-5.0

ILOAD = 10 mA , 1.5V≤ (VCONTROL - VOUT) ≤ 12V

0.8V≤ (VPOWER - VOUT) ≤ 5.5V

1 3 mV

Load Regulation AMS1508/-1.5/-2.5/-2.85/

-3.0/-3.3/-3.5/-5.0

VCONTROL = VOUT + 2.5V, VPOWER =VOUT + 0.8V,

ILOAD = 10mA to 8A

1 5 mV

Minimum Load

Current AMS1508 VCONTROL = 5V, VPOWER =3.3V, VADJ = 0V (Note 3) 5 10 mA

Control Pin Current

(Note 4)

AMS1508/-1.5/-2.5/-2.85/

-3.0/-3.3/-3.5/-5.0

VCONTROL = VOUT + 2.5V, VPOWER =VOUT + 0.8V,

ILOAD = 10mA to 8A

80 135 mA

Ground Pin Current

(Note 4)

AMS1508-1.5/-2.5/-2.85/

-3.0/-3.3/-3.5/-5.0

VCONTROL = VOUT + 2.5V, VPOWER =VOUT + 0.8V,

ILOAD = 10mA to 8A

6 10 mA

Adjust Pin Current AMS1508 VCONTROL = 2.75V, VPOWER = 2.05V, ILOAD = 10mA 50 120 µA

Current Limit AMS1508/-1.5/-2.5/-2.85/

-3.0/-3.3/-3.5/-5.0

(VIN - VOUT) = 5V 7.1 8.0 A

Ripple Rejection AMS1508/-1.5/-2.5/-2.85/

-3.0/-3.3/-3.5/-5.0

VCONTROL = VPOWER = VOUT + 2.5V, VRIPPLE = 1VP-P

ILOAD = 4A

60 80 dB

Thermal Regulation AMS1508 TA = 25°C, 30ms pulse 0.002 0.020 %W

Thermal Resistance

Junction-to-Case T Package: Control Circuitry/ Power Transistor

M Package: Control Circuitry/ Power Transistor

0.65/2.70

°C/W

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS1508

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at IOUT = 0 mA, and TJ = +25°C unless otherwise specified.

Parameter Device Conditions Min Typ Max Units

Dropout Voltage Note 2

Control Dropout

(VCONTROL - VOUT)AMS1508/-1.5/-2.5/-2.85/

-3.0/-3.3/-3.5/-5.0

VPOWER =VOUT + 0.8V, ILOAD = 10mA

VPOWER =VOUT + 0.8V, ILOAD = 8A

1.00

1.15

1.30

Power Dropout

(VPOWER - VOUT)AMS1508/-1.5/-2.5/-2.85/

-3.0/-3.3/-3.5/-5.0

VCONTROL =VOUT + 2.5V, ILOAD = 10mA

VCONTROL =VOUT + 2.5V, ILOAD = 8A

.10

.45

0.17

0.50

Parameters identified with boldface type apply over the full operating temperature range.

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. For guaranteed specifications and test conditions, see the

Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed.

Note 2: Unless otherwise specified VOUT = VSENSE. For the adjustable device VADJ = 0V.

Note 3: The dropout voltage for the AMS1508 is caused by either minimum control voltage or minimum power voltage. The specifications represent the minimum

input/output voltage required to maintain 1% regulation.

Note 4: For the adjustable device the minimum load current is the minimum current required to maintain regulation. Normally the current in the resistor divider

used to set the output voltage is selected to meet the minimum load current requirement.

Note 5: The control pin current is the drive current required for the output transistor. This current will track output current with a ratio of about 1:100. The

minimum value is equal to the quiescent current of the device.

PIN FUNCTIONS

Sense (Pin 1): This pin is the positive side of the

reference voltage for the device. With this pin it is

possible to Kelvin sense the output voltage at the load.

Adjust (Pin 2/5): This pin is the negative side of the

reference voltage for the device. Adding a small bypass

capacitor from the Adjust pin to ground improves the

transient response. For fixed voltage devices the Adjust

pin is also brought out to allow the user to add a bypass

capacitor.

GND (Pin 2, 7-Lead only): For fixed voltage devices this

is the bottom of the resistor divider that sets the output

voltage.

VPOWER (Pin 5/6): This pin is the collector to the power

device of the AMS1508. The output load current is

supplied through this pin. The voltage at this pin must

be between 0.1V and 0.8V greater than the output

voltage for the device to regulate.

CONTROL

(Pin 4/3): This pin is the supply pin for the

control circuitry of the device. The current flow into

this pin will be about 1% of the output current. The

voltage at this pin must be 1.3V or greater than the

output voltage for the device to regulate.

Output (Pin 3/4): This is the power output of the

device.

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS1508

APPLICATION HINTS

The AMS1508 series of adjustable and fixed regulators are

designed to power the new generation of microprocessors. The

AMS1508 is designed to make use of multiple power supplies,

existing in most systems, to reduce the dropout voltage. One of

the advantages of the two supply approach is maximizing the

efficiency.

The second supply is at least 1V greater than output voltage and

is providing the power for the control circuitry and supplies the

drive current to the NPN output transistor. This allows the NPN

to be driven into saturation; thereby reducing the dropout voltage

by a VBE compared to conventional designs. For the control

voltage the current requirement is small equal to about 1% of the

output current or approximately 70mA for a8A load. Most of this

current is drive current for the NPN output transistor. This drive

current becomes part of the output current. The maximum voltage

on the Control pin is 13V. The maximum voltage at the Power

pin is 7V. Ground pin current for fixed voltage devices is typical

6mA and is constant as a function of load. Adjust pin current for

adjustable devices is 60µA at 25°C and varies proportional to

absolute temperature.

The improved frequency compensation of AMS1508 permits the

use of capacitors with very low ESR. This is critical in addressing

the needs of modern, low voltage high sped microprocessors. The

new generation of microprocessors cycle load current from several

hundred mA to several A in tens of nanoseconds. Output voltage

tolerances are tighter and include transient response as part of the

specification. Designed to meet the fast current load step

requirements of these microprocessors, the AMS1508 also saves

total cost by needing less output capacitance to maintain

regulation.

Careful design of the AMS1508 has eliminated any supply

sequencing issues associated with a dual supply system. The

output voltage will not turn on until both supplies are operating.

If the control voltage comes up first, the output current will be

limited to a few milliamperes until the power input voltage comes

up. If power input comes up first the output will not turn on at all

until the control voltage comes up. The output can never come up

unregulated. By tying the control and power inputs together the

AMS1508 can also be operated as a single supply device. In

single supply operation the dropout will be determined by the

minimum control voltage.

The new features of the AMS1508 require additional pins over

the traditional 3-terminal regulator. Both the fixed and adjustable

versions have remote sense pins, permitting very accurate

regulation of output voltage at the load, rather than at the

regulator. As a result, over an output current range of 100mA to

8A with a 2.5V output, the typical load regulation is less than

1mV. For the fixed voltages the adjust pin is brought out allowing

the user to improve transient response by bypassing the internal

resistor divider. Optimum transient response is provided using a

capacitor in the range of 0.1µF to 1µF for bypassing the Adjust

pin. The value chosen will depend on the amount of output

capacitance in the system.

In addition to the enhancements mentioned, the reference

accuracy has been improved by a factor of two with a guaranteed

initial tolerance of ±0.6% at 25°C. This device can hold 1%

accuracy over the full temperature range and load current range,

guaranteed, when combined with ratiometrically accurate internal

divider resistors and operating with an input/output differential of

well under 1V.

Typical applications for the AMS1508 include 3.3V to 2.5V

conversion with a 5V control supply, 5V to 4.2V conversion with

a 12V control supply or 5V to 3.6V conversion with a 12V

control supply. Due to the innovative design of the AMS1508 it is

easy to obtain dropout voltages of less than 0.5V at 4A along with

excellent static and dynamic specifications. Capable of 8A of

output current with a maximum dropout of 0.8V the AMS1508

also has a fast transient response that allows it to handle large

current changes associated with the new generation of

microprocessors. The device is fully protected against overcurrent

and overtemperature conditions.

Grounding and Output Sensing

The AMS1508 allows true Kelvin sensing for both the high and

low side of the load. As a result the voltage regulation at he load

can be easily optimized. Voltage drops due to parasitic

resistances between the regulator and the load can be placed

inside the regulation loop of the AMS1508. The advantages of

remote sensing are illustrated in figures 1 through 3.

Figure 1 shows the device connected as a conventional 3 terminal

regulator with the Sense lead connected directly to the output of

the device. R

is the parasitic resistance of the connections

between the device and the load. Typically the load is a

microprocessor and R

is made up of the PC traces and /or

connector resistances (in the case of a modular regulator)

between the regulator and the processor. Trace A of figure 3

illustrates the effect of RP. Very small resistances cause

significant load regulation steps.

Figure 2 shows the device connected to take advantage of the

remote sense feature. The Sense pin and the top of the resistor

divider are connected to the top of the load; the bottom of the

resistor divider is connected to the bottom of the load. R

is now

connected inside the regulation loop of the AMS1508 and for

reasonable values of R

the load regulation at the load will be

negligible. The effect on output regulation can be seen in trace B

of figure 3.

CONTROL

POWER SENSE

AMS1508

OUTPUT

ADJ

LOAD

VOUT

3.3V

Figure 1. Conventional Load Sensing

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS1508

APPLICATION HINTS

CONTROL

POWER SENSE

AMS1508

OUTPUT

ADJ

LOAD

VOUT

3.3V

Figure 2. Remote Load Sensing

(∆IOUT)(RP)

TIME

VOUT

FIGURE 1

VOUT

FIGURE 2

IOUT

Figure 3. Remote Sensing Improves Load Regulation

Voltage drops due to R

are not eliminated; they will add to the

dropout voltage of the regulator regardless of whether they are

inside or outside the regulation loop. The AMS1508 can control

the voltage at the load as long as the input-output voltage is

greater than the total of the dropout voltage of the device plus the

voltage drop across RP.

Stability

The circuit design used in the AMS1508 series requires the use of

an output capacitor as part of the device frequency compensation.

The addition of 150µF aluminum electrolytic or a 22µF solid

tantalum on the output will ensure stability for all operating

conditions. For best frequency response use capacitors with an

ESR of less than 1Ω.

In order to meet the transient requirements of the processor larger

value capacitors are needed. Tight voltage tolerances are required

in the power supply. To limit the high frequency noise generated

by the processor high quality bypass capacitors must be used. In

order to limit parasitic inductance (ESL) and resistance (ESR) in

the capacitors to acceptable limits, multiple small ceramic

capacitors in addition to high quality solid tantalum capacitors are

required.

When the adjustment terminal is bypassed to improve the ripple

rejection, the requirement for an output capacitor increases. The

Adjust pin is brought out on the fixed voltage device specifically

to allow this capability. To ensure good transient response with

heavy load current changes capacitor values on the order of

100µF are used in the output of many regulators. To further

improve stability and transient response of these devices larger

values of output capacitor can be used.

The modern processors generate large high frequency current

transients. The load current step contains higher order frequency

components than the output coupling network must handle until

the regulator throttles to the load current level. Because they

contain parasitic resistance and inductance, capacitors are not

ideal elements. These parasitic elements dominate the change in

output voltage at the beginning of a transient load step change.

The ESR of the output capacitors produces an instantaneous step

in output voltage (∆V=∆I)(ESR). The ESL of the output

capacitors produces a droop proportional to the rate of change of

the output current (V= L)(∆I/∆t). The output capacitance

produces a change in output voltage proportional to the time until

the regulator can respond (∆V=∆t) (∆I/C). Figure 4 illustrates

these transient effects.

CAPACITANCE

EFFECTS

ESR

EFFECTS

ESL

EFFECTS

POINT AT WHICH REGULATOR

TAKES CONTROL

SLOPE, V/t = ∆I/C

Figure 4.

Output Voltage

The AMS1508 series develops a 1.25V reference voltage

between the Sense pin and the Adjust pin (Figure5). Placing a

resistor between these two terminals causes a constant current to

flow through R1 and down through R2 to set the overall output

voltage. In general R1 is chosen so that this current is the

specified minimum load current of 10mA.The current out of the

Adjust pin is small, typically 50µA and it adds to the current

from R1. Because I

ADJ

is very small it needs to be considered

only when very precise output voltage setting is required. For

best regulation the top of the resistor divider should be connected

directly to the Sense pin.

CONTROL

POWER OUTPUT

AMS1508

SENSE

ADJ R1

VOUT

VREF

VPOWER

IADJ

VCONTROL

VOUT = VREF (1+ R2/R1)+IADJR2

Figure 5. Setting Output Voltage

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS1508

APPLICATION HINTS

Protection Diodes

Unlike older regulators, the AMS1508 family does not need any

protection diodes between the adjustment pin and the output and

from the output to the input to prevent die over-stress. Internal

resistors are limiting the internal current paths on the AMS1508

adjustment pin, therefore even with bypass capacitors on the

adjust pin no protection diode is needed to ensure device safety

under short-circuit conditions. The Adjust pin can be driven on a

transient basis ±7V with respect to the output without any device

degradation.

Diodes between the Output pin and V

POWER

pin are not usually

needed. Microsecond surge currents of 50A to 100A can be

handled by the internal diode between the Output pin and VPOWER

pin of the device. In normal operations it is difficult to get those

values of surge currents even with the use of large output

capacitances. If high value output capacitors are used, such as

1000µF to 5000µF and the V

POWER

pin is instantaneously shorted

to ground, damage can occur. A diode from output to input is

recommended, when a crowbar circuit at the input of the

AMS1508 is used (Figure 6). Normal power supply cycling or

even plugging and unplugging in the system will not generate

current large enough to do any damage.

CONTROL

POWER OUTPUT

AMS1508

SENSE

ADJ R1

VOUT

VPOWER

D2*D1*

VCONTROL

Figure 6. Optional Clamp Diodes Protect Against

Input Crowbar Circuits

If the AMS1508 is connected as a single supply device with the

control and power input pins shorted together the internal diode

between the output and the power input pin will protect the

control input pin. As with any IC regulator, none the protection

circuitry will be functional and the internal transistors will break

down if the maximum input to output voltage differential is

exceeded.

Thermal Considerations

The AMS1508 series have internal power and thermal limiting

circuitry designed to protect the device under overload conditions.

However maximum junction temperature ratings should not be

exceeded under continuous normal load conditions. Careful

consideration must be given to all sources of thermal resistance

from junction to ambient, including junction-to-case, case-to-heat

sink interface and heat sink resistance itself.

Thermal resistance specification for both the Control Section and

the Power Transistor are given in the electrical characteristics.

The thermal resistance of the Control section is given as

0.65°C/W and junction temperature of the Control section can

run up to 125°C. The thermal resistance of the Power section is

given as 2.7°C/W and junction temperature of the Power section

can run up to 150°C. Due to the thermal gradients between the

power transistor and the control circuitry there is a significant

difference in thermal resistance between the Control and Power

sections.

Virtually all the power dissipated by the device is dissipated in

the power transistor. The temperature rise in the power transistor

will be greater than the temperature rise in the Control section

making the thermal resistance lower in the Control section. At

power levels below 12W the temperature gradient will be less

than 25°C and the maximum ambient temperature will be

determined by the junction temperature of the Control section.

This is due to the lower maximum junction temperature in the

Control section. At power levels above 12W the temperature

gradient will be greater than 25°C and the maximum ambient

temperature will be determined by the Power section. In both

cases the junction temperature is determined by the total power

dissipated in the device. For most low dropout applications the

power dissipation will be less than 12W.

The power in the device is made up of two components: the

power in the output transistor and the power in the drive circuit.

The power in the control circuit is negligible.

The power in the drive circuit is equal to:

PDRIVE = (VCONTROL - VOUT)(ICONTROL)

where I

CONTROL

is equal to between I

OUT

/100(typ) and

IOUT/58(max).

The power in the output transistor is equal to:

POUTPUT = (VPOWER -VOUT)(IOUT)

The total power is equal to:

PTOTAL = PDRIVE + POUTPUT

Junction-to-case thermal resistance is specified from the IC

junction to the bottom of the case directly below the die. This is

the lowest resistance path for the heat flow. In order to ensure the

best possible thermal flow from this area of the package to the

heat sink proper mounting is required. Thermal compound at the

case-to-heat sink interface is recommended. A thermally

conductive spacer can be used, if the case of the device must be

electrically isolated, but its added contribution to thermal

resistance has to be considered.

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS1508

TYPICAL PERFORMANCE CHARACTERISTICS

Reference Voltage vs

Temperature

1.242

1.244

1.246

1.248

1.250

1.252

1.254

1.256

1.258

-50 -25 0 25 50 75 100 125 150

REFERENCE VOLTAGE (V)

TEMPERATURE (° C)

Load Current Step Response

50µ/DIV

VOUT

50µV/DIV

400mA

LOAD

012345670123 4 56701234567

100

120

140

CONTROL PIN CURRENT (mA)

MINMUM CONTROL VOLTAGE

(VCONTROL - VOUT)(V)

0.5

1.0

MINIMUM POWER VOLTAGE

OUTPUT CURRENT (A) OUTPUT CURRENT (A) OUTPUT CURRENT (A)

Control Pin Current vs

Output Current Minimum Control Voltage Dropout Voltage -

Minimum Power Voltage

TYPICAL

DEVICE TJ = 125° C

TJ = 25° C

TJ = 25° C TJ = 125° C

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS1508

PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.

5 LEAD TO-220 PLASTIC PACKAGE (T)

5 LEAD TO-263 PLASTIC PACKAGE (M)

0.060

(1.524)

TYP

0.390-0.415

(9.906-10.541)

0.330-0.370

(8.382-9.398)

0.057-0.077

(1.447-1.955)

0.165-0.180

(4.191-4.572) 0.045-0.055

(1.143-1.397)

0.095-0.115

(2.413-2.921)

0.90-0.110

(2.29-2.79)

0.013-0.023

(0.330-0.584)

0.108

(2.74)

TYP

(0.102 )

+0.203

-0.102

0.004 +0.008

-0.004

M (DD5) AMS DRW#042192R1

(5.05-5.54 )

0.199-0.218

0.032

(0.81)

TYP

0.335-0.345

(8.51-8.77)

0.387-0.413

(9.83-10.49) 0.170-0.190

(4.32-4.82) 0.045-0.055

(1.143-1.397)

0.105

(2.67)

0.013-0.023

(0.330-0.584)

T (TO-220 ) AMS DRW# 042194

0.149-0.153

(3.77-3.87)

DIA

0.240-0.260

(6.100-6.600)

0.032

(0.81) TYP

TYP

0.062-0.072

(1.570-1.830)

0.460-0.500

(11.684-12.700)

0.520-0.570

(13.208-14.478)

0.980-1.070

(24.892-27.178)

0.575-0.605

(14.61-15.37)

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS1508

PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted (Continued).

7 LEAD TO-220 PLASTIC PACKAGE (T)

0.330-0.370

(8.382-9.398)

0.040-0.060

(1.016-1.524)

0.390-0.415

(9.906-10.541) 0.165-0.180

(4.191-4.572) 0.045-0.055

(1.143-1.397)

0.095-0.115

(2.413-2.921)

0.013-0.023

(0.330-0.584)

T (TO-220 ) AMS DRW# 042291

0.147-0.155

(3.734-3.937)

DIA

0.230-0.270

(5.842-6.858)

0.460-0.500

(11.684-12.700)

0.570-0.620

(14.478-15.748)

0.520-0.620

(13.208-14.224)

0.980-1.070

(24.892-27.178)

0.026-0.036

(0.660-0.914)