GENERAL DESCRIPTION
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 1 AME, Inc.
Analog Microelectronics
