ADP1111ANZ-12 데이터 시트보기 (PDF) - Analog Devices

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ADP1111ANZ-12

Micropower, Step-Up/Step-Down SW Regulator; Adjustable and Fixed 3.3 V, 5 V, 12 V

Analog Devices 

ABSOLUTE MAXIMUM RATINGS

Parameter

Supply Voltage

SW1 Pin Voltage

SW2 Pin Voltage

Feedback Pin Voltage (ADP1111)

Switch Current

Maximum Power Dissipation

Operating Temperature Range

ADP1111A

Storage Temperature Range

Lead Temperature (Soldering, 10 sec)

Rating

36 V

50 V

−0.5 V to VIN

5.5 V

1.5 A

500 mW

0°C to 70°C

−65°C to +150°C

300°C

3V

INPUT

TYPICAL APPLICATION

SUMIDA

CD54-220K

22µH MBRS120T3

ILIM VIN

SW1

10µF

ADP1111AR-5

(OPTIONAL)

SENSE

GND SW2

5V

100mA

33µF

Figure 1. 3 V to 5 V Step-Up Converter

ESD CAUTION

ADP1111

PIN DESCRIPTIONS

Mnemonic Function

ILIM

For normal conditions this pin is connected to VIN.

When lower current is required, a resistor should be

connected between ILIM and VIN. Limiting the switch

current to 400 mA is achieved by connecting a 220 Ω

resistor.

VIN

Input Voltage.

SW1

Collector Node of Power Transistor. For step-down

con-figuration, connect to VIN. For step-up configu-

ration, connect to an inductor/diode.

SW2

Emitter Node of Power Transistor. For step-down

configuration, connect to inductor/diode. For step-up

configuration, connect to ground. Do not allow this

pin to go more than a diode drop below ground.

GND

Ground.

AO

Auxiliary Gain (GB) Output. The open collector can

sink 300 μA. It can be left open if unused.

SET

Gain Amplifier Input. The amplifier’s positive input is

connected to SET pin and its negative input is con-

nected to the 1.25 V reference. It can be left open if

unused.

FB/SENSE

On the ADP1111 (adjustable) version this pin is con-

nected to the comparator input. On the ADP1111-3.3,

ADP1111-5 and ADP1111-12, the pin goes directly

to the internal application resistor that sets output

voltage.

PIN CONFIGURATIONS

8-Lead Plastic DIP

(N-8)

8-Lead Plastic SOIC

(SO-8)

ILIM 1

8 FB (SENSE)*

VIN 2 ADP1111 7 SET

SW1

3

TOP VIEW

(Not to Scale)

6

A0

SW2 4

5 GND

ILIM 1

8 FB (SENSE)*

VIN 2 ADP1111 7 SET

SW1

3

TOP VIEW

(Not to Scale)

6

A0

SW2 4

5 GND

*FIXED VERSIONS

*FIXED VERSIONS

REV. A

Ͳ3Ͳ

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