Page 

Portable Solutions

Buck Converters

Device

Package(s)

Topology

Frequency

Input

Voltage

Output Voltage

Max

Current

Typical

Efficiency

Features

NCP1500

Micro8™

PWM/Linear

External Sync

70-60 kHz

.7 - 5. V

1.0 - 1.8 V Selectable

00 mA

91%

Turns into LDO Mode when Sync is Absent

NCP1501

Micro8

PWM/Linear

External Sync

50-1000 kHz

.5 - 5. V

1.0 - 1.8 V Selectable

00 mA

9%

Sync Rec, Turns into LDO Mode when Sync is

Absent

NCP1510A

MicroBump-9

PWM/Pulse

1 MHz or External Sync

50-1000 kHz

.7 - 5. V

1.0 - 1.8 V Selectable

00 mA

95%

Sync Rec, Turns into Pulse Mode to Save Power

when Sync Pin is Low

NCP1519*

Thin SOT--5

PWM/PFM

1.7 Mhz

.7 - 5.5 V

Adj 0.9 - . V by External

Resistors, 1., 1.5, 1.8 V

00 mA

96%

Sync Rec, Ultra-Low 60

NCP151

Thin SOT--5,

Thin DFN-6

PWM/PFM

1.5 Mhz

.7 - 5.5 V

Adjustable 0.9 - . V

by External Resistors

600 mA

96%

Sync Rec, Ultra-Low 0

NCP15

Thin SOT--5

PWM/PFM

 MHz

.7 - 5.5 V

Adjustable 0.9 - . V

by External Resistors

600 mA

9%

Sync Rec, Ultra-Low 60

NCP15*

MicroBump-8

PWM/PFM

 MHz

.7 - 5.5 V

Adjustable 0.9 - . V

by External Resistors

600 mA

9%

Sync Rec, Ultra-Low 60

NCP156

Thin DFN-10

Dual Output

PWM + LDO

 MHz

.7 - 5.5 V

PWM 1. V; LDO .8 V

Other Options Available

PWM 00 mA

LDO 150 mA

95%

Sync Rec, Ultra-Thin DFN: 0.55 mm Thickness

NCP159*

Thin SOT--5

PWM/PFM

1.7 Mhz

.7 - 5.5 V

Adj 0.9 - . V by External

Resistors, 1., 1.5, 1.8 V

1 A

96%

Sync Rec, Ultra-Low 60

NCP150

Micro8

PWM/PFM

600 kHz or External Sync

Up to 100 kHz

.7 - 5.5 V

.5 - 5.0 V

600 mA

9%

Programmable Soft-Start

NCP1550

SOT--5

PWM/PFM

600 kHz

.5 - 6.0 V

1.8 - . V

000 mA

(Ext Switch)

90%

Enable Pin

High Efficiency DC-DC Converters

Key Features

• PWM buck converter operates either as an LDO or in PFM mode when output current

decreases (NCP1500/01/19/1///9), maximizing efficiency at both light and

full loads

• High switching frequencies allow use of smaller output filters, capacitors, and inductors,

while maintaining high efficiency

100

90

80

70

60

50

500

600

400

300

200

100

0

COUT

10 F

CIN

10 F

MBRM120

L

15 H

8

1 SHD

CB0

7

2 SYN

CB1

6

3 VO

GND

5

4 LX

VIN

VIN

GND

2

VIN

1

EN

3

LX 5

FB 4

OFF ON

VIN

CIN

COUT

R1

R2

Cff

L

VOUT

Typical Buck Converter

Typical Step-Down Converter

* Planned H06

NCP1521 - Efficiency vs Output Current