NCP1526 datasheet(2/16 Pages) ONSEMI

Part #	NCP1526

Description	400 mA, 1.2 V, High?묮fficiency, Step?묭own Converter with Low Noise Voltage Regulator Optimized for RF Module

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Manufacturer	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

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NCP1526

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2

BYPASS

GND2

EN2

EN1

FB

GND1

VIN2

V1

LX

VIN1 10

9

8

7

6

1

2

3

4

5

OFF ON

BUCK

LDO

OFF ON

C4

L1

Vout BUCK

C1

C3

Vout LDO

C5

C2

Vbattery

Figure 1. Typical Applications Circuit

1

2

3

4

5

FB

EN1

EN2

GND2

BYPASS

OFF ON

100 nF

6

V1 BLOCK

LOGIC

CONTROL

LDO

1 mF

Vout LDO

2.80 V, 150 mA

7

4.7 mF

VIN2

Vbattery

8

V1

GND1

9

10

LX

4.7 mF

Vout

BUCK

1.20 V,

400 mA

2.2 mH

VIN1 4.7 mF

Vbattery

VIN2

LOGIC

CONTROL

Buck Converter

VIN1

PWM

CONTROL

Q2

Q1

Thermal

Shutdown

REFERENCE

VOLTAGE

VIN1

ILIMIT

Figure 2. Simplified Block Diagram

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NCP1526 Datasheet(PDF) 2 Page - ON Semiconductor

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