SS6642G Datasheet, PDF (1/22 Pages) Silicon Standard Corp. – 3-Pin Simple Step-Up DC/DC Converter

SS6642G
3-Pin Simple Step-Up DC/DC Converter
FEATURES
A guaranteed start-up from less than 0.9 V.
High efficiency.
Low quiescent current.
Fewer external components needed.
Low ripple and low noise.
Fixed output voltage: 2.7V, 3.0V, 3.3V, 3.7V,
4.5V and 5V.
Space-saving packages: SOT-23, SOT-89 and
TO-92.
Pb-free, RoHS compliant.
APPLICATIONS
Pagers.
Cameras.
Wireless Microphones.
Pocket Organizers.
Battery Backup Suppliers.
Portable Instruments.
DESCRIPTION
The SS6642G is a high efficiency step-up DC/DC
converter for applications using 1 to 4 NiMH bat-
tery cells. Only three external components are re-
quired to deliver a fixed output voltage of 2.7V,
3.0V, 3.3V, 3.7V, 4.5V or 5V. The SS6642G starts
up from less than 0.9V input with 1mA load. A
Pulse Frequency Modulation scheme optimizes
performance for applications with light output
loading and low input voltages. The output ripple
and noise are lower when compared with circuits
operating in PSM mode.
The PFM control circuit operating at a 100KHz
(max.) switching rate results in smaller passive
components. The space saving SOT-23, SOT-
89 and TO-92 packages make the SS6642G an
ideal choice for DC/DC converter for space con-
scious applications, such as pagers, electronic
cameras, and wireless microphones.
TYPICAL APPLICATION CIRCUIT
V_IN
V_OUT
L1
100µH
D1
SS12
+
C1
22µF
SW
SS6642-xxG
VOUT
GND
+ _C2
47µF
One Cell Step-Up DC/DC Converter
1/15/2005 Rev.2.10
www.SiliconStandard.com
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