SIP12506 Datasheet, PDF (1/11 Pages) Vishay Siliconix – 1-MHz Boost Converter with OVP for White LED Applications

SiP12506
Vishay Siliconix
1-MHz Boost Converter with OVP for White LED Applications
DESCRIPTION
The SiP12506 is a 1 MHz current-mode boost converter with
a feedback voltage of 0.208 V which offers small size and
high power conversion efficiency. Its input voltage range is
from 2.6 V to 9 V, and output voltage can go up to 20 V. The
internal frequency compensation minimizes number of exter-
nal components. The integrated 28 V power switch can carry
up to 1.6 A easily providing for 200 mA load current from a
3.6 V input supply. These features make the SiP12506 the
ideal. The internal soft-start circuit controls the rate of rise of
the output voltage during start-up to prevent overshoot. The
logic-level shutdown pin can be used to reduce quiescent
current to < 1 µA and, effectively, extend battery life. Thermal
shutdown at 160 °C is also included. The low FB voltage of
0.208 V improves the overall circuit efficiency. These fea-
tures and more, make the SiP12506 an ideal power solution
to white LED, OLED, LCD, and CCD applications operating
from a single or dual cell lithium-ion battery.
SiP12506 is available in 6-pin MLP33 package and is spec-
ified to operate over the industrial temperature range of
- 40 °C to 85 °C.
FEATURES
• Output Voltage Range up to 20 V
• FB Voltage of 0.208 V
• Cycle-By-Cycle Current Limiting with Internal
Frequency Compensation
• 2.6 V to 9 V Input Voltage Range
• 1 MHz Switching Frequency
• > 90 % efficiency
• Low R_DS(on): 0.4 Ω (at 3.3 V)
• 1.6 A Switch Current Limit
• < 1 µA Low Shutdown Current
• Internal Soft-Start Control
• Thermal Shutdown Protection (160 °C)
• 6 pin MLP33 Package
RoHS
COMPLIANT
APPLICATIONS
• CCD Bias Supplies
• TFT-LCD Displays
• OLED Driver
• White LED Backlight
• Digital Cameras
• Portable Phones and Game Devices
• PDAs and Palm-Top Computers
TYPICAL APPLICATION CIRCUIT
V_IN
1 µF
SHD
L ^MBR0530
10 µH
2
V_IN
3 _SHD
1
LX
Cout
1 µF
SiP12506
5 _VOUT
4
FB
GND
6
0. 208 V
10.5
V_OUT
Figure 1. SiP12506 Typical Application Circuit
100
95
90
85
80
75
70
65
60
55
50
45
40
0
V_IN = 7.2 V
V_IN = 5 V
V_IN = 3.3 V
V_OUT = 13 V
50
100
150
200
250
300
Load Current (mA)
Figure 2. Efficiency Curve
Document Number: 73861
S-70547–Rev. D, 26-Mar-07
www.vishay.com
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