lp55271tlx National Semiconductor Corporation, lp55271tlx Datasheet - Page 9

• Manufacturer Part Number: lp55271tlx
• Description: Tiny Led Driver For Camera Flash And 4 Leds With I2c Programmability, Connectivity Test And Audio Synchronization
• Manufacturer: National Semiconductor Corporation

Boost Converter Typical Performance Characteristics
T
V
C
J
OUT
VDD2
= 25
= 5.0V, C
= 100 nF, L1 = 4.7 µH (Note 9).
o
C. Unless otherwise noted, typical performance characteristics apply to the LP55271 Block Diagram with: V
Boost Line Regulation 3.0V - 3.6V
IN
Boost Converter Efficiency
Battery Current vs Voltage
= 10 µF, C
OUT1
= 10 µF, C
OUT2
20202483
20202479
20202481
= 10
µ
F, C
VDD_IO
9
= 100 nF, C
Boost Typical Waveforms at 100 mA Load
Boost Startup to 5.4V with no Load
VREF
Boost Frequency vs RT Resistor
= 100 nF, C
VDDA
= 4.7 µF, C
VDD1
20202482
20202484
20202480
www.national.com
IN
= 100 nF,
= 3.6V,