ADP1612 데이터 시트보기 (PDF) - Analog Devices

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ADP1612

650 kHz /1.3 MHz Step-Up PWM DC-to-DC Switching Converters

Analog Devices 

Data Sheet

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

ADP1612/ADP1613

COMP 1

8 SS

ADP1612/

FB 2 ADP1613 7 FREQ

EN 3 TOP VIEW 6 VIN

GND 4 (Not to Scale) 5 SW

Figure 3. Pin Configuration

Table 4. Pin Function Descriptions

Pin No. Mnemonic Description

1

COMP

Compensation Input. Connect a series resistor-capacitor network from COMP to GND to compensate the regulator.

2

FB

Output Voltage Feedback Input. Connect a resistive voltage divider from the output voltage to FB to set the

regulator output voltage.

3

EN

Enable Input. Drive EN low to shut down the regulator; drive EN high to turn on the regulator.

4

GND

Ground.

5

SW

Switching Output. Connect the power inductor from the input voltage to SW and connect the external rectifier

from SW to the output voltage to complete the step-up converter.

6

VIN

Main Power Supply Input. VIN powers the ADP1612/ADP1613 internal circuitry. Connect VIN to the input source

voltage. Bypass VIN to GND with a 10 µF or greater capacitor as close to the ADP1612/ADP1613 as possible.

7

FREQ

Frequency Setting Input. FREQ controls the switching frequency. Connect FREQ to GND to program the oscillator

to 650 kHz, or connect FREQ to VIN to program it to 1.3 MHz. If FREQ is left floating, the part defaults to 650 kHz.

8

SS

Soft Start Timing Capacitor Input. A capacitor connected from SS to GND brings up the output slowly at power-

up and reduces inrush current.

Rev. D | Page 5 of 28

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