器件名称: PAM2400AAA270
功能描述: 3-Pin Synchronous Step-Up DC/DC Converter
文件大小: 203.23KB 共14页
简 介:3-Pin Synchronous Step-Up DC/DC Converter Features
n Schottky Diode Embedded, Saving Cost and Space n Low Start-up Voltage (0.9V) n High Efficiency up to 88% n Low Quiescent Current n Low Ripple and Noise n Available Output Voltage: 2.0V,2.7V,2.8V, 3.0V, 3.3V,3.8V and 5.0V n Space Saving Packages: SOT-89, SOT-23 n Pb-Free Package
PAM2400
General Description
The PAM2400 is a high efficiency step-up DC/DC converter, delivering a fixed output voltage of 2.0V, 2.7V, 2.8V, 3.0V, 3.3V, 3.8V or 5.0V. The device starts up with an input voltage as low as 0.9V at 1mA load. The Pulse Frequency Modulation (PFM) scheme provides optimized performance for applications with light load and low input voltages. The PAM2400 employs a built-in synchronous rectifier, instead of requiring an external Schottky diode, so that to improve system efficiency and save system cost and PCB area. The internal PFM control circuit operates at constant switching frequency of 100KHz. Only three external components are required. The space saving SOT-89 and SOT-23 packages make t h e PA M 2 4 0 0 i d e a l f o r s p a c e c o n s c i o u s applications.
Applications
n n n n n n
Pagers Cameras Wireless Microphones Pocket Organizers Battery Backup Suppliers Portable Instruments
Typical Application
V IN
L1 100 μ H
VO
Block Diagram
SW
PAM2400
VOUT
VOUT
1M
SW
GND +
C IN 22 μ F
+
+
CO 47 μ F
1.25V REF
Enable GND
OSC 100KHz
Power Analog Microelectronics , Inc
www.poweranalog.com 12/2007 Rev 1.0
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