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SS6612 Datasheet Preview

SS6612 Datasheet

High-Efficiency Synchronous Step-up DC/DC Converter

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SS6612
High-Efficiency Synchronous Step-up DC/DC
Converter with Selectable Current Limit
FEATURES
High efficiency (93% with VIN=2.4V, VOUT= 3.3V,
IOUT=200mA)
Output current up to 500mA. (VIN=2.4V, at
VOUT=3.3V, CLSEL=OUT)
Quiescent supply current of 20µA
Power-saving shutdown mode (0.1µA typical).
Internal synchronous rectifier (no external diode
required).
Selectable current limit for reduced ripple.
Low-noise, anti-ringing feature.
On-chip low-battery detector.
Low-battery hysteresis.
Space-saving package: MSOP-10
APPLICATIONS
Palmtop & Notebook Computers.
PDAs
Wireless Phones
Pocket Organizers.
Digital Cameras.
Hand-Held Devices with 1 to 3 Cells of
NiMH/NiCd Batteries.
DESCRIPTION
The SS6612 is a high-efficiency step-up
DC/DC converter, with a start-up voltage as low
as 0.8V, and an operating voltage down to 0.7V.
Consuming only 20µA of quiescent current,
this device includes 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
two external resistors for 1.8V to 5.5V; con-
necting FB to OUT to get 3.3V; or connecting
to GND to get 5.0V. For additional design flexibil-
ity, the peak current of the internal switch is
selectable (0.65A or 1.0A). The SS6612 also
features a circuit that eliminates noise caused
by inductor ringing.
TYPICAL APPLICATION CIRCUIT
VIN
ON OFF
Selectable Current Limit
(1.0A or 0.65A)
Low Battery
Detection
+
47µF
SHDN
200
BATT
LX
CLSEL
OUT
SS6612
LBI LBO
REF GND FB
0.1µF
22µH
Output 3.3V, 5.0V
+
or Adj. (1.8V to
5.5V) up to 300mA
47µF
Low-battery
Detect Out
Rev.2.02 12/06/2003
www.SiliconStandard.com
1 of 16




Silicon Standard

SS6612 Datasheet Preview

SS6612 Datasheet

High-Efficiency Synchronous Step-up DC/DC Converter

No Preview Available !

www.DataSheet4U.net
SS6612
ORDERING INFORMATION
SS6612CXXX
Packing
TR: Tape and reel
Package type
O: MSOP-10
Example: SS6612COTR
in MSOP-10 package supplied
on tape and reel.
PIN CONFIGURATION
MSOP-10
TOP VIEW
FB 1
LBI 2
LBO 3
CLSEL 4
REF 5
10 OUT
9 LX
8 GND
7 BATT
6 SHDN
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (OUT to GND)
Switch Voltage (LX to GND)
Battery Voltage (BATT to GND)
SHDN, LBO to GND
LBI, REF, FB, CLSEL to GND
Switch Current (LX)
Output Current (OUT)
Operating Temperature Range
Storage Temperature Range
8.0V
VOUT+ 0.3V
6.0V
6.0V
VOUT+0.3V
-1.5A to +1.5A
-1.5A to +1.5A
-40°C ~ +85°C
-65°C ~150°C
TEST CIRCUIT
Refer to the typical application circuit.
Rev.2.02 12/06/2003
www.SiliconStandard.com
2 of 16


Part Number SS6612
Description High-Efficiency Synchronous Step-up DC/DC Converter
Maker Silicon Standard
Total Page 16 Pages
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