ADM666AAN [ADI]

Tri-Mode: +3.3 V, +5 V, Adjustable Micropower Linear Voltage Regulators; 三模式： +3.3 V ，+ 5 V，可调节微功耗线性稳压器


型号：	ADM666AAN
厂家：	ADI
描述：	Tri-Mode: +3.3 V, +5 V, Adjustable Micropower Linear Voltage Regulators 三模式： +3.3 V ，+ 5 V，可调节微功耗线性稳压器稳压器
文件：	总9页 (文件大小：334K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Tri-Mode: +3.3 V, +5 V, Adjustable

Micropower Linear Voltage Regulators

ADM663A/ADM666A*

FEATURES

Tri-Mode Operation

FUNCTIONAL BLOCK DIAGRAMS

3.3 V, 5 V Fixed or +1.3 V to +16 V Adjustable

Low Power CMOS: 9 µA max Quiescent Current

High Current 100 mA Output

Low Dropout Voltage

Upgrade for ADM663/ADM666

“Small” 0.1 µF Output Capacitor (0805 Style)

+2 V to +16.5 V Operating Range

Low Battery Detector ADM666A

No Overshoot on Power-Up

Thermal Shutdown

V_IN

V_OUT2

V_OUT1

0.5V

1.3V

SENSE

V_IN–50mV

SHDN

V_SET

APPLICATIONS

50mV

Handheld Instruments

LCD Display Systems

Pagers

V_TC

Battery Operated Equipment

0.9V

ADM663A

GENERAL DESCRIPTION

GND

The ADM663A/ADM666A are precision linear voltage regula-

tors featuring a maximum quiescent current of 9 µA. They can

be used to give a fixed +3.3 V or +5 V output with no additional

external components or can be adjusted from 1.3 V to 16 V

using two external resistors. Fixed or adjustable operation is au-

tomatically selected via the V_SETinput. The low quiescent cur-

rent makes these devices especially suitable for battery powered

systems. The input voltage range is 2 V to 16.5 V, and an out-

put current up to 100 mA is provided. Current limiting may be

set using a single external resistor. For additional safety, an

internal thermal shutdown circuit monitors the internal die

temperature.

V_IN

V_OUT

0.5V

1.3 V

SENSE

V_IN–50mV

SHDN

V_SET

50mV

The ADM666A features additional low battery monitoring cir-

cuitry to detect for low battery voltages.

LBI

LBO

1.3V

The ADM663A/ADM666A are pin compatible enhancements

for the ADM663/ADM666. Improvements include an addi-

tional 3.3 V output range, higher output current, and operation

with a small output capacitor.

ADM666A

GND

The ADM663A/ADM666A are available in an 8-pin DIP and

narrow surface mount (SOIC) packages.

*Patent pending.

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.

Tel: 617/329-4700 Fax: 617/326-8703

ADM663A/ADM666A–SPECIFICATIONS _{(V = +9 V, T = T}

_MINto T_MAX, unless otherwise noted)

Parameter

Min

Typ

Max

Units

Test Conditions/Comments

Input Voltage, V_IN

Quiescent Current, I_Q

Output Voltage, V_OUT(2)(+5 V Mode)

Output Voltage, V_OUT(2)(+3.3 V Mode)

Dropout Voltage, V_DO

2.0

16.5

5.25

3.465

0.9

µA

No Load, V_IN= +16.5 V

V_SET= GND

V_SET= V_IN

4.75

3.135

5.0

3.3

0.75

1.0

0.03

I_OUT= 40 mA, V_OUT= +14.5 V

I_OUT= 100 mA, V_OUT= +14.5 V

+2 V ≤ V_IN≤ +15 V, V_OUT= V_REF

V_IN= (V_OUT+3 V), 1 mA ≤ I_OUT(2)≤ 100 mA

V_SET= GND (Fixed +5 V Output)

Dropout Voltage, V_DO

Line Regulation (∆V_OUT(2)/∆V_IN

1.2

0.35

%/V

)

Load Regulation

∆V_OUT(2);(∆V_OUT(2)/∆I_OUT(2)

)

0.3

1.0

Ω

0.15

0.25

0.35

0.30

1.2

Ω

_SET= V_IN(Fixed +3.3 V Output)

V_SET= Resistive Divider (Adjustable Output)

∆V_OUT1;(∆V_OUT1/∆I_OUT1

Reference Voltage, V_SET

Reference Tempco (∆V_SET/∆T)

_SETInternal Threshold

)

ADM663A, 50 µA ≤ I_OUT1≤ 10 mA

T_A= +25°C, V_OUT= V_SET

1.27

1.4

1.33

±100

ppm/°C

_F/ALow

_F/AHigh

V_IN– 50

±0.01 ±10

V_SET< V_F/ALow for +5 V Output

V_SET> V_F/AHigh for +3.3 V Output

_SETInput Current, I_SET

Shutdown Input Voltage, V_SHDN

V_SHDNHigh = Output Off

0.3

V_SHDNLow = Output On

Shutdown Input Current, I_SHDN

SENSE Input Threshold, V_OUT– V_SENSE

SENSE Input Resistance, R_SENSE

Input-Output Saturation Resistance, R_SAT

ADM663A, V_OUT1

±0.01 ±10

0.5

MΩ

Current Limit Threshold

200

400

Ω

V_IN= +2 V, I_OUT= 1 mA

_IN= +9 V, I_OUT= 10 mA

_IN= +15 V, I_OUT= 10 mA

Output Current, I_OUT(2)

Minimum Load Current, I_{L (MIN)}

LBI Input Threshold

Low Going

High Going

Hysteresis

LBI Input Current, I_LBI

LBO Output Saturation Resistance, R_SAT

LBO Output Leakage Current

100

1.1

µA

+3 V ≤ V_IN≤ +16.5 V, V_IN– V_OUT= +1.5 V

1.0

1.26

1.29

ADM666A

ADM666A, I_SAT= 2 mA

ADM666A, LBI = 1.4 V

ADM663A

1.42

Ω

±0.01 ±10

0.2

0.9

8.0

+2.5

_TCOpen Circuit Voltage, V_TC

_TCSink Current, I_TC

2.0

mV/°C

V_TCTemperature Coefficient

Specifications subject to change without notice.

ABSOLUTE MAXIMUM RATINGS*

(T_A= +25°C unless otherwise noted)

Power Dissipation, R-8 . . . . . . . . . . . . . . . . . . . . . . . . 570 mW

(Derate 6 mW/°C above +30°C)

θ_JA, Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 170°C/W

Operating Temperature Range

Input Voltage, V_IN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . +18 V

Terminal Voltage

Industrial (A Version) . . . . . . . . . . . . . . . . . –40°C to +85°C

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . +300°C

Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . +215°C

Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . +220°C

ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>5000 V

(ADM663A) Pins 1, 3, 5, 6, 7

. . . . . . . . . . . . . . . . . . . . . . (GND – 0.3 V) to (V_IN+ 0.3 V)

(ADM666A) Pins 1, 2, 3, 5, 6

. . . . . . . . . . . . . . . . . . . . . . . (GND – 0.3 V) to (V_IN+ 0.3 V)

(ADM663A) Pin 2 . . . . . . . .(GND – 0.3 V) to (V_OUT1+ 0.3 V)

(ADM666A) Pin 7 . . . . . . . . . . . . . . (GND – 0.3 V) to +16.5 V

Output Source Current

(ADM663A, ADM666A) Pin 2 . . . . . . . . . . . . . . . . . . 100 mA

(ADM663A) Pin 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 mA

Output Sink Current, Pin 7 . . . . . . . . . . . . . . . . . . . . . .–20 mA

Power Dissipation, N-8 . . . . . . . . . . . . . . . . . . . . . . . . 800 mW

(Derate 8.3 mW/°C above +30°C)

*This is a stress rating only and functional operation of the device at these or any

other conditions above those indicated in the operation sections of this specifica-

tion is not implied. Exposure to absolute maximum rating conditions for extended

periods of time may affect reliability.

θ_JA, Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 120°C/W

–2–

REV. 0

ADM663A/ADM666A

PIN FUNCTION DESCRIPTION

Mnemonic Function

TERMINOLOGY

Dropout Voltage: The input/output voltage differential at

which the regulator no longer maintains regulation against fur-

ther reductions in input voltage. It is measured when the output

decreases 100 mV from its nominal value. The nominal value is

the measured value with V_IN= V_OUT+2 V.

V_{OUT(1) (2)}

V_IN

Voltage Regulator Output(s).

Voltage Regulator Input.

Line Regulation: The change in output voltage as a result of

a change in the input voltage. It is specified as a percentage

change in output voltage for an input voltage change.

SENSE

Current Limit Sense Input. (Referenced to

V_OUT(2).) If not used, it should be connected to

V_OUT(2).

∆V_OUT

(100)

Line Reg =

∆V_IN

GND

LBI

Ground Pin. Must be connected to 0 V.

V_OUT

Low Battery Detect Input. Compared with 1.3 V.

Low Battery Detect Output. Open Drain Output.

LBO

SHDN

Load Regulation: The change in output voltage for a change

in output current.

Digital Input. May be used to disable the device

so that the power consumption is minimized.

∆V_OUT

Load Reg (Ω) =

∆I_OUT

V_SET

Voltage Setting Input. Connect to GND for

+5 V output, to V_INfor +3.3 V output or

connect to external resistive divider for

adjustable output.

Quiescent Current: The input bias current which flows when

the regulator output is unloaded or when the regulator is in

shutdown.

Sense Input Threshold: Current limit sense voltage. This

is the voltage (referenced to V_OUT(2)) at which current limiting

occurs.

V_TC

Temperature-Proportional Voltage for negative

TC Output.

Input-Output Saturation Resistance (ADM663A): This is a

measure of the internal MOS transistor effective resistance in se-

ries with V_OUT1. The minimum input-output voltage differential

at low currents may be calculated by multiplying the load cur-

rent by the saturation resistance.

PIN CONFIGURATIONS

DIP & SOIC

SENSE

ADM663A

Thermal Limiting: This feature monitors the internal die tem-

perature and disables the output when an internal temperature

of 125°C is reached.

OUT2

TOP VIEW

(Not to Scale)

OUT1

SET

GND

SHDN

Maximum Power Dissipation: The maximum total device

dissipation for which the regulator will continue to operate

within specifications.

DIP & SOIC

SENSE

LBO

ADM666A

OUT

TOP VIEW

(Not to Scale)

LBI

SET

GND

SHDN

ORDERING GUIDE

Temperature

Range

Package

Option

Model

ADM663AAN

ADM663AAR

ADM666AAN

ADM666AAR

–40°C to +85°C

N-8

R-8

N-8

R-8

REV. 0

–3–

ADM663A/ADM666A

GENERAL INFORMATION

Both the ADM663A and the ADM666A contain a shutdown

(SHDN) input that can be used to disable the error amplifier

and hence the voltage output. The power consumption in shut-

down reduces to less than 9 µA.

The ADM663A/ADM666A contains a micropower bandgap

reference voltage source; an error amplifier, A1; three compara-

tors, C1, C2, C3, and a series pass output transistor. A P-chan-

nel FET and an NPN transistor are used on the ADM663A

while the ADM666A uses an NPN output transistor.

V_IN

V_OUT

0.5V

1.3 V

CIRCUIT DESCRIPTION

SENSE

The internal bandgap reference is trimmed to 1.3 V ± 30 mV.

This is used as a reference input to the error amplifier A1. The

feedback signal from the regulator output is supplied to the

other input by an on-chip voltage divider or by two external re-

sistors. When V_SETis at ground, the internal divider tap between

R1 and R2, provides the error amplifier’s feedback signal giving

a +5 V output. When V_SETis at V_IN, the internal divider tap be-

tween R2 and R3 provides the error amplifier’s feedback signal

giving a +3.3 V output. When V_SETis at more than 50 mV

above ground and less than 50 mV below V_IN, the error ampli-

fier’s input is switched directly to the V_SETpin, and external

resistors are used to set the output voltage. The external resis-

tors are selected so that the desired output voltage gives 1.3 V

V_IN–50mV

SHDN

V_SET

50mV

LBI

LBO

1.3V

ADM666A

GND

at V_SET

Comparator C1 monitors the output current via the SENSE in-

put. This input, referenced to V_OUT(2), monitors the voltage

drop across a load sense resistor. If the voltage drop exceeds

0.5 V, then the error amplifier A1 is disabled and the output

current is limited.

Figure 2. ADM666A Functional Block Diagram

Circuit Configurations

For a fixed +5 V output the V_SETinput is grounded and no ex-

ternal resistors are necessary. This basic configuration is shown

in Figure 3. For a fixed +3.3 V output, the V_SETinput is con-

nected to V_INas shown in Figure 4. Current limiting is not be-

The ADM663A has an additional amplifier, A2, which provides

a temperature proportional output, V_TC. If this is summed into

the inverting input of the error amplifier, a negative temperature

coefficient results at the output. This is useful when powering

liquid crystal displays over wide temperature ranges.

ing utilized so the SENSE input is connected to V_OUT(2)

SENSE

+6V TO +16V

INPUT

ADM663A

ADM666A

The ADM666A has an additional comparator, C4, that com-

pares the voltage on the low battery input, LBI, pin to the inter-

nal +1.3 V reference. The output from the comparator drives an

open drain FET connected to the low battery output pin, LBO.

The low battery threshold may be set using a suitable voltage

divider connected to LBI. When the voltage on LBI falls below

1.3 V, the open drain output LBO is pulled low.

OUT(2)

+5V

OUTPUT

GND

SHDN

SET

Figure 3. A Fixed +5 V Output

SENSE

V_IN

V_OUT2

V_OUT1

+4.5V TO +16V

INPUT

ADM663A

ADM666A

OUT(2)

+3.3V

OUTPUT

0.5V

1.3V

GND

SHDN

SENSE

SET

V_IN–50mV

SHDN

V_SET

Figure 4. A Fixed +3.3 V Output

Output Voltage Setting

50mV

If V_SETis not connected to GND or to V_IN, the output voltage is

set according to the following equation:

V_TC

0.9V

(R1+ R2)

V_OUT=V_SET

where V_SET= 1.30 V.

ADM663A

GND

Figure 1. ADM663A Functional Block Diagram

–4–

REV. 0

ADM663A/ADM666A

The resistor values may be selected by first choosing a value for

R1 and then selecting R2 according to the following equation:

the current drain to a low quiescent (9 µA maximum) current.

This is very useful for low power applications. The SHDN input

should be driven with a CMOS logic level signal since the input

threshold is 0.3 V. In TTL systems, an open collector driver

with a pull-up resistor may be used.

V_OUT

R2 = R1×

− 1

1. 30

If the shutdown function is not being used, then it should be

connected to GND.

The input leakage current on V_SETis 10 nA maximum. This al-

lows large resistor values to be chosen for R1 and R2 with little

degradation in accuracy. For example, a 1 MΩ resistor may be

selected for R1, and then R2 may be calculated accordingly.

The tolerance on V_SETis guaranteed at less than ±30 mV so in

most applications, fixed resistors will be suitable.

Low Supply or Low Battery Detection

The ADM666A contains on-chip circuitry for low power supply

or battery detection. If the voltage on the LBI pin falls below the

internal 1.3 V reference, then the open drain output LBO will

go low. The low threshold voltage may be set to any voltage

above 1.3 V by appropriate resistor divider selection.

SENSE

+1.3V TO +15V

OUTPUT

+2V TO +16V

INPUT

OUT(2)

V_BATT

1. 3 V

ADM663A

ADM666A

R3 = R4

− 1

SHDN

where R3 and R4 are the resistive divider resistors and V_BATTis

the desired low voltage threshold.

SET

GND

Since the LBI input leakage current is less than 10 nA, large val-

ues may be selected for R3 and R4 in order to minimize loading.

For example, a 6 V low threshold may be set using 10 MΩ for

R3 and 2.7 M Ω for R4.

Figure 5. Adjustable Output

Table I. Output Voltage Selection

+2V TO +16V

INPUT

SENSE

+1.3V TO +15V

OUTPUT

V_SET

V_OUT

OUT

ADM666A

GND

V_IN

R1/R2

+5 V

+3 V

ADJ

LBI

SET

LBO

SHDN

GND

LOW

Current Limiting

BATTERY

OUTPUT

Current limiting may be achieved by using an external current

sense resistor in series with V_OUT(2). When the voltage across

the sense resistor exceeds the internal 0.5 V threshold, current

limiting is activated. The sense resistor is therefore chosen such

that the voltage across it will be 0.5 V when the desired current

limit is reached.

Figure 6. ADM666A Adjustable Output with Low Battery

Detection

High Current Operation

The ADM663A contains an additional output, V_OUT1, suitable

for directly driving the base of an external NPN transistor. Fig-

ure 7 shows a configuration which can be used to provide +5 V

with boosted current drive. A 1 Ω current sensing resistor limits

the current at 0.5 A.

0.5

I_CL

R_CL

where R_CLis the current sense resistor, I_CLis the maximum

current limit.

The value chosen for R_CLshould also ensure that the current is

limited to less than the 100 mA absolute maximum rating and

also that the power dissipation will also be within the package

maximum ratings.

2N4237

OUT1

10µF

OUT2

ADM663A

If current limiting is employed, there will be an additional volt-

age drop across the sense resistor that must be considered when

determining the regulators dropout voltage.

100Ω

SHDN

1.0Ω

SHUTDOWN

If current limiting is not used, the SENSE input should be con-

GND

SENSE

SET

nected to V_OUT(2)

10µF

+5V, 0.5A

OUTPUT

Shutdown Input (SHDN)

The SHDN input allows the regulator to be turned off with a

logic level signal. This will disable the output and reduce

Figure 7. ADM663A Boosted Output Current (0.5 A)

REV. 0

–5–

ADM663A/ADM666A

Temperature Proportional Output

be kept within the maximum limits. The package power dissi-

pation is calculated from the product of the voltage differential

across the regulator times the current being supplied to the load.

The power dissipation must be kept within the maximum limits

given in the Absolute Maximum Ratings section.

The ADM663A contains a V_TCoutput with a positive tempera-

ture coefficient of +2.5 mV/°C. This may be connected to the

summing junction of the error amplifier (V_SET) through a resis-

tor resulting in a negative temperature coefficient at the output

of the regulator. This is especially useful in multiplexed LCD

displays to compensate for the inherent negative temperature

coefficient of the LCD threshold. At +25°C the voltage at the

VTC output is typically 0.9 V. The equations for setting both

the output voltage and the tempco are given below. If this func-

tion is not being used, then V_TCshould be left unconnected.

_D= (V_IN–V_OUT)(I_L)

The die temperature is dependent on both the ambient tempera-

ture and on the power being dissipated by the device. The

ADM663A/ADM666A contains an internal thermal limiting cir-

cuit which will shut down the regulator if the internal die tem-

perature exceeds 125°C. Therefore, care must be taken to

ensure that, under normal operating conditions, the die tem-

perature is kept below the thermal limit.

V_OUT= V_SET1+

−V_TC

SET

(

)

T_J= T_A+ P_D(θ_JA

This may be expressed in terms of power dissipation as follows:

P_D= (T_J– T_A)/(θ_JA

)

–R2

TCV_OUT

TCV

(

)

where V_SET= +1.3 V, V_TC= +0.9 V, TCV_TC= +2.5 mV/°C

where:

SENSE

T_J= Die Junction Temperature (°C)

T_A= Ambient Temperature (°C)

P_D= Power Dissipation (W)

V_OUT2

V_OUT

ADM663A

V_SET

θ_JA= Junction to Ambient Thermal Resistance (°C/W)

If the device is being operated at the maximum permitted ambi-

ent temperature of 85°C the maximum power dissipation per-

mitted is:

V_TC

Figure 8. ADM663A Temperature Proportional Output

P_D(max) = (T_J(max) – T_A)/(θ_JA

P_D(max) = (125 – 85)/(θ_JA)

= 40/θ_JA

)

APPLICATION HINTS

Input-Output (Dropout Voltage)

A regulator’s minimum input-output differential or dropout

voltage determines the lowest input voltage for a particular out-

put voltage. The ADM663A/ADM666A dropout voltage is 1 V

at its rated output current. For example when used as a fixed

+5 V regulator, the minimum input voltage is +6 V. At lower

output currents (I_OUT< 10 mA) on the ADM663A, V_OUT1may

be used as the output driver in order to achieve lower dropout

voltages. In this case the dropout voltage depends on the voltage

drop across the internal FET transistor. This may be calculated

by multiplying the FET’s saturation resistance by the output

current, for example with V_IN= 9 V, R_SAT= 20 Ω. Therefore,

the dropout voltage for 5 mA is 100 mV. As the current limit

circuitry is referenced to V_OUT2, V_OUT2should be connected to

θ_JA= 120°C/W for the 8-pin DIP (N-8) package

θ_JA= 170°C/W for the 8-pin SOIC (R-8) package

Therefore, for a maximum ambient temperature of 85°C

P_D(max) = 333 mW for N-8

P_D(max) = 235 mW for R-8

At lower ambient temperatures the maximum permitted power

dissipation increases accordingly up to the maximum limits

specified in the absolute maximum specifications.

The thermal impedance (θ_JA) figures given are measured in still

air conditions and are reduced considerably where fan assisted

cooling is employed. Other techniques for reducing the thermal

impedance include large contact pads on the printed circuit

board and wide traces. The copper will act as a heat exchanger

thereby reducing the effective thermal impedance.

_OUT1. For high current operation V_OUT2should be used alone

and V_OUT1left unconnected.

SENSE

High Power Dissipation Recommendations

+6V TO +16V

INPUT

OUT2

Where excessive power dissipation due to high input-output dif-

ferential voltages and or high current conditions exists, the sim-

plest method of reducing the power requirements on the

regulator is to use a series dropper resistor. In this way the ex-

cess power can be dissipated in the external resistor. As an ex-

ample, consider an input voltage of +12 V and an output

voltage requirement of +5 V @ 100 mA with an ambient tem-

perature of +85°C. The package power dissipation under these

conditions is 700 mW which exceeds the maximum ratings. By

using a dropper resistor to drop 4 V, the power dissipation re-

quirement for the regulator is reduced to 300 mW which is

within the maximum specifications for the N-8 package at

ADM663A

+5V

OUTPUT

OUT1

SET

GND

SHDN

Figure 9. Low Current, Low Dropout Configuration

Thermal Considerations

The ADM663A/ADM666A can supply up to 100 mA load cur-

rent and can operate with input voltages up to 16.5 V, but the

package power dissipation and hence the die temperature must

–6–

REV. 0

ADM663A/ADM666A

An input capacitor helps reduce noise, improves dynamic per-

formance and reduces the input dV/dt at the regulator input. A

suitable input capacitor is 0.1 µF or greater.

+85°C. The resistor value is calculated as R = 4/0.1 = 40 Ω. A

resistor power rating of 400 mW or greater may be used.

Bypass Capacitors

The high frequency performance of the ADM663A/ADM666A

may be improved by decoupling the ouput using a filter capaci-

tor. A capacitor of 0.1 µF is suitable.

Typical Performance Characteristics

V_INDC = +9V

T_A= +25°C

V_INp-p = +2V

V_OUTDC = +5V

T_A= +25°C

V_OUT= +5V

V_OUT= +3.3V

0.01

0.1

100

1000

10000

V_IN– Volts

FREQUENCY – Hz

Figure 10. Power Supply Rejection Ratio vs. Frequency

Figure 12. Quiescent Current vs. Input Voltage

2.0

1.8

1.0

= +25°C

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

= +2V

= +25°C

= +2V

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

= +15V

= +9V

= +15V

– mA

OUT2

OUT1

Figure 13. V_OUT2Input-Output Differential vs.

Output Current

Figure 11. V_OUT1Input-Output Differential vs.

Output Current

REV. 0

–7–

ADM663A/ADM666A

OUTLINE DIMENSIONS

Dimensions shown in inches and (mm).

8-Pin Plastic DIP

(N-8)

0.280 (7.11)

0.240 (6.10)

PIN 1

0.325 (8.25)

0.300 (7.62)

0.430 (10.92)

0.348 (8.84)

0.060 (1.52)

0.015 (0.38)

0.195 (4.95)

0.115 (2.93)

0.210

(5.33)

MAX

0.150

(3.81)

MIN

0.015 (0.381)

0.008 (0.204)

0.160 (4.06)

0.115 (2.93)

SEATING

PLANE

0.100

(2.54)

0.022 (0.558)

0.014 (0.356)

0.070 (1.77)

0.045 (1.15)

BSC

8-Terminal SO

(R-8)

0.1574 (4.00)

0.1497 (3.80)

PIN 1

0.2440 (6.20)

0.2284 (5.80)

0.1968 (5.00)

0.1890 (4.80)

0.0196 (0.50)

x 45

0.0099 (0.25)

0.102 (2.59)

0.094 (2.39)

0.0098 (0.25)

0.0040 (0.10)

0.0500 (1.27)

0.0160 (0.41)

0.0500

(1.27)

BSC

0.0192 (0.49)

0.0138 (0.35)

0.0098 (0.25)

0.0075 (0.19)

–8–

REV. 0

ADM663A/ADM666A

ORDERING GUIDE

Temperature

Range

Package

Option*

Model

ADM663AAN

ADM663AAR

ADM666AAN

ADM666AAR

–40°C to +85°C

N-8

R-8

N-8

R-8

*For outline information see Package Information section.

REV. 0

–9–

ADM666AAN [ADI]

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