High-efficiency Synchronous Step-up DC/DC Converter
High efficiency boost converter
Output current up to 500mA
No external diode required
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
Palmtop and notebook computers.
Hand-held devices with 1 to 3 cells of
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
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
REF GND FB
Output 3.3V, 5.0V
+ or adjustable from 1.8V to 5.5V
47µF up to 300mA output
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