SS6845G Datasheet, PDF (1/13 Pages) Silicon Standard Corp. – Regulated 5V Charge Pump

SS6845G
Regulated 5V Charge Pump
PRODUCT SUMMARY
Input voltage range: 2.7V to 5.0V
Regulated output voltage of 5V ±4%
Output current: 100mA (V_IN = 3.3V)
110mA (V_IN = 3.6V)
FEATURES
Ultralow power: I_IN = 13µA
No inductors needed
Very low shutdown current: <1µA
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 (13µA typical
with no load) and a low external part count (one
0.22µF 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.
Pb-free; RoHS-compliant SOT-23-6 package
TYPICAL APPLICATION CIRCUIT
1-Cell
Li-ion Battery
C_IN
2.2µF
U1
1 _VOUT
2 _GND
3
SHDN
C+ ⁶
VIN ⁵
4
C-
V_OUT
** ^R1
C_OUT
2.2µF
* ** *
0.22µF
C_FLY
SS6845G
Regulated 5V Output from 2.7V to 5.0V Input
* WLED series number: NSPW310BS, V_F=3.6V, I_F=20mA
** _{R1 =} ^{VOUT − VF} , where N_WLED is the number of WLEDs.
I_F × N_WLED
C_IN, C_OUT: CELMK212BJ225MG (X5R) (0805), TAIYO YUDEN
C_FLY : CEEMK212BJ224KG (X7R) (0805), TAIYO YUDEN
7/21/2005 Rev.3.01
www.SiliconStandard.com
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