Micropower Step-Up DC/DC Converter
www.DataSheet4U.com
AME, Inc.
AME5130
Micropower Step-Up DC/DC Converter
n General Description
The AME5130 is a fixed ...
Description
www.DataSheet4U.com
AME, Inc.
AME5130
Micropower Step-Up DC/DC Converter
n General Description
The AME5130 is a fixed off-time step-up DC/DC converter in a small 5-lead SOT-25 package.The AME5130 is ideal for LCD panels requiring low current and high efficiency as well as LED applications for cellular phone backlighting, PDAS,and other hand-held devices. The low 400ns off-time allows the use of tiny external components. AME5130 can drive up 8 white LEDs from a single LiIon battery DC 2V to 5.5V; can be turned on by putting more than 1V at pin 4(RUN). To control LED brightness, the LED current can be pulsed by applying a PWM (pulse width modulated) signal with a frequency range of 100Hz to 50KHz to the RUN pin.
n Typical Application
V IN 2.5V-4.2V 5 V IN L 10µH 1 SW ILED COUT 4.7µ F Ceramic AME5130 D Option for 6LEDs
CIN 4.7µF Ceramic
>1.1V 4 RUN 0V GND 2 FB
3 R2 80Ω
* ILED =VFB/R2
n Features
l 0.7Ω internal switch l Uses small surface mount components l Adjustable output voltage up to 20V l 2V to 5.5V input range l Input undervoltage lockout l 0.01µA shutdown current l Small 5-Lead SOT-25 package
Figure 1¡G Six White LEDs Application in Li-lon Battery
V IN 2.5V-4.2V
L 15µ H
D
20V 20mA
5 CIN 4.7µF Ceramic 4 VIN
1 SW 3
R1 510K
AME5130 FB RUN GND 2
COUT 4.7µ F Ceramic
R2 33K
n Applications
l l l l l White LED Back-Lighting Hand-held Devices Digital Cameras Portable Applications LCD Bias Power Figure 2¡G Typical 20V Application
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AME, Inc.
AME5130
Micropower...
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