SS6610G Datasheet, PDF (1/16 Pages) Silicon Standard Corp. – High-efficiency Synchronous Step-up DC/DC Converter

SS6610/11G
High-efficiency Synchronous Step-up DC/DC Converter
PRODUCT SUMMARY
High efficiency boost converter
Output current up to 500mA
No external diode required
FEATURES
Quiescent supply current of 20mA.
Power-saving shutdown mode (0.1µA typical).
Internal synchronous rectifier
On-chip low-battery detector.
Low battery hysteresis
Pb-free, RoHS compliant MSOP-8
APPLICATIONS
Palmtop and notebook computers.
PDAs
Wireless phones
Pocket organizers.
Digital cameras.
Hand-held devices with 1 to 3 cells of
NiMH/NiCd batteries.
DESCRIPTION
The SS6610/11G are high-efficiency step-up
DC/DC converters, with a start-up voltage as low
as 0.8V, and an operating voltage down to 0.7V.
Consuming only 20µA of quiescent current,
these devices include a built-in synchronous rec-
tifier that reduces size and cost by eliminating
the need for an external Schottky diode, and
improves overall efficiency by minimizing
losses.
The switching frequency can range up to
500KHz depending on the load and input volt-
age. The output voltage can be easily set by:
1) two external resistors for 1.8V to 5.5V;
2) connecting FB to OUT to get 3.3V; or
3) connecting FB to GND to get 5.0V.
The peak current of the internal switch is fixed at 1A
(SS6610G) or 0.65A (SS6611G) for design flexibility.
TYPICAL APPLICATION CIRCUIT
V_IN
+
47µF
ON
OFF
Low Battery
Detection
SHDN
LX
SS6610G ^OUT
SS6611G
LBI
LBO
REF GND FB
0.1µF
22µH
Output 3.3V, 5.0V
+
or adjustable from 1.8V to 5.5V
47µF ^{up to 300mA output}
Low-battery
Detect Out
4/21/2006 Rev.3.01
www.SiliconStandard.com
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