PWM Controlled Step‐Up DC/DC Controllers/Converters

Series

437

4

■General Description

■Features

■Applications

NCMOS Low Power Consumption

NOperating Voltage

: 0.9V~10.0V

NOutput Voltage Range

: 2.0V~7.0V

NOutput Voltage Accuracy: ±2.5%

NSelectable Oscillator Frequency

: 50kHz, 100kHz,

180kHz

The XC6371 series are a group of PWM controlled step-up DC/DC

converters.

On-chip proprietary phase compensation and soft start-up circuits ensure

excellent transient response and improved performance.

Output voltage can be selected from 2.0V to 7.0V in 0.1V increments

(accuracy: ±2.5%). Oscillator frequency is also selectable from three

frequencies; 50, 100, and 180kHz (accuracy: ±15%).

Every built-in switching transistor type enables a step-up circuit to be

configured using only three external components; a coil, a diode, and a

capacitor.

External transistor versions are available to accommodate high output

current applications.

5-pin packages, which are provided with either a CE (chip enable)

function that reduces power consumption during shut-down mode, or a

SOT-89 small package.

Operating (start-up) voltage range

: 0.9V~10V

Output voltage range : 2.0V~7.0V in 0.1V increments

Highly accurate

: Set-up voltage ±2.5%

Oscillator frequency

: 50kHz, 100kHz, 180khz (±15%)

selectable

Maximum output currents (Tr built-in)

Highly efficient (Tr built-in)

Built-in switching transistor type and an external Tr type are

available.

Five-lead packaged units offer either Chip Enable or

Phase compensation and soft start-up circuits built-in Small

package

: SOT-89 mini-power mold (3-pin, 5-pin)

Note(1): Performance depends on external components and

PCB layout.

GCellular phones, Pagers

GPalmtops

GCameras, Video recorders

GPortable products

■Typical Application Circuit

■Typical Performance

Characteristic

SOT-89

(TOP VIEW)

12

3

GND

（Tantalum）

L

SD

0.1

1

10

100

1000

L＝100μH（CR54），

XC6371A301PR

100

80

60

40

20

0

1.2V

1.5V

1.8V

2.7V

04S_04XC6371 02.09.12 14:44 ページ 437