Datasheet
1.75V to 4.5V, 10mA 1ch
Synchronous Boost DC/DC Converter
BU33DV5G
●General Description
●Key Specifications
The BU33DV5G devices provide a power supply
solution for products powered by either two-cell alkaline,
NiCd or NiMH, or one-cell Li-ion or Li-polymer battery.
Output currents can go as high as 10mA while using
two alkaline, and discharge it down to 1.8 V.
The boost converter is based on a fixed frequency,
Pulse-width-modulation (PWM) controller using a
synchronous rectifier to obtain maximum efficiency. The
maximum peak current in the boost switch is typically
limited to a value of 10 mA.
Input voltage range:
Output voltage range:
Average output Current:
Switching frequency:
Standby current:
Power-OFF Circuit Current
Operating temperature range:
1.75V to 4.5V
3.23V to 3.37V
10mA(Max.)
100KHz(Typ.)
250µA (Typ.)
1.0µA (max)
-25℃ to +85℃
BU33DV5G output voltage is fixed by an internal
resistor divider.
The device is packaged in a 5-pin small SSOP5
package.
●Features
Synchronous Boost DC/DC Converter(PWM)
10mA @Vout=3.3V, Vin=1.8V
●Package(s)
W(Typ.) x D(Typ.) x H(Max.)
2.90mm x 2.80mm x 1.25mm
SSOP5
UVLO-detect Voltage:1.65V(Typ.)
UVLO-release Voltage:1.75V(Typ.)
Thermal Shutdown
●Applications
Two-Cell Alkaline, NiCd or NiMH or
Single-CellLi Battery-Powered Products
Portable Audio Players
PDA
Cellular Phones
Personal Medical Products
SSOP5
●Typical Application Circuit(s)
●Typical Performance characteristics
Efficiency[Ta=25℃]
3.3V
C2(4.7μF)
ON
VOUT
EN
100
90
80
70
60
50
40
30
20
10
0
OFF
3.0V
1.8V
2.8V
2.4V
2.0V
GND
VIN
VIN
SW
C1(47μF)
L1(22. μH)
Figure 1. Application Circuit
0.0
5.0
10.0
15.0
20.0
Io [mA]
Figure 2. Efficiency
○Product structure:Silicon monolithic integrated circuit ○This product is not designed for protection against radioactive rays
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TSZ02201-0Q1Q0AH00220-1-2
14.Feb.2013 Rev.001
© 2013 ROHM Co., Ltd. All rights reserved.
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