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PAM2400AAA280 PDF Datasheet浏览和下载

型号:
PAM2400AAA280
PDF下载:
下载PDF文件 在线浏览文档
内容描述:
3引脚同步升压型DC / DC转换器 [3-Pin Synchronous Step-Up DC/DC Converter]
文件大小:
199 K
文件页数:
14 Pages
品牌Logo:
品牌名称:
PAM [ POWER ANALOG MICOELECTRONICS ]



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3-Pin Synchronous Step-Up DC/DC Converter
Features
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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
V
O
Block Diagram
SW
PAM2400
VOUT
VOUT
1M
SW
-
GND
+
C
IN
22 μ F
+
+
C
O
47 μ F
1.25V REF
Enable
GND
OSC 100KHz
Power Analog Microelectronics
,
Inc
www.poweranalog.com
12/2007 Rev 1.0
1