SS6845G datasheet(1/13 Pages) SSC

номер детали	SS6845G

подробное описание детали	Regulated 5V Charge Pump

PDF	13 Pages

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производитель	SSC [Silicon Standard Corp.]

домашняя страница	http://www.siliconstandard.com

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SS6845G

7/21/2005 Rev.3.01

Input voltage range: 2.7V to 5.0V

Regulated output voltage of 5V ±4%

PRODUCT SUMMARY

Regulated 5V Charge Pump

Output current: 100mA (VIN = 3.3V)

110mA (VIN = 3.6V)

FEATURES

Ultralow power: IIN = 13µA

No inductors needed

Very low shutdown current: <1

µA

Internal oscillator: 650KHz

Short-circuit and over-temperature protection

APPLICATIONS

White or Blue LED Backlighting

SIM Interface Supplies for Cellular Telephones

Li-Ion Battery Backup Supplies

Local 3V to 5V Conversion

Smart Card Readers

PCMCIA Local 5V Supplies

DESCRIPTION

The SS6845G is a micropower charge pump

DC/DC converter that produces a regulated 5V

output. The input voltage range is 2.7V to 5.0V.

Extremely low operating current (13

µA typical

with no load) and a low external part count (one

0.22

µF flying capacitor and two small bypass

capacitors at the input and output) make the

SS6845G ideally suitable for small, battery-

powered applications.

The SS6845G operates as a PSM-mode

(Pulse Skipping Modulation) switched capacitor

voltage doubler to produce a regulated output

and features thermal shutdown capability and

short circuit protection.

TYPICAL APPLICATION CIRCUIT

VOUT

1

GND

2

SHDN

3

C-

4

VIN

5

C+ 6

U1

SS6845G

CIN

CFLY

COUT

VOUT

2.2

µF

0.22

µF

2.2

µF

1-Cell

Li-ion Battery

R1

*

**

Regulated 5V Output from 2.7V to 5.0V Input

*

WLED series number: NSPW310BS, VF=3.6V, IF=20mA

**

WLED

F

OUT

N

I

V

1

R

×

−

=

, where NWLED is the number of WLEDs.

CIN, COUT: CELMK212BJ225MG (X5R) (0805), TAIYO YUDEN

CFLY

: CEEMK212BJ224KG (X7R) (0805), TAIYO YUDEN

Pb-free; RoHS-compliant SOT-23-6 package

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