AMC3100
1.5MHz, 600mA SYNCHRONOUS
STEP-DOWN CONVERTER
www.addmtek.com
DESCRIPTION
FEATURES
The AMC3100 is a high efficiency synchronous buck
DC/DC converter using a constant frequency, current mode
architecture. Adjustable version and fixed output voltages of
1.2V, 1.5V and 1.8V are available. 300uA low supply current
at no load and <1µA supply current at shutdown. The 2.5V to
5.5V input voltage range makes the AMC3100 ideally suited
for single Li-Ion battery-powered applications. 100% duty
cycle provides low dropout operation, extending battery life in
portable systems. PWM pulse skipping mode operation
provides very low output ripple voltage for noise sensitive
applications.
Switching frequency is internally set at 1.5MHz,
allowing using small surface mount inductors and capacitors.
The internal synchronous switch increases efficiency and
eliminates the need for an external Schottky diode. Low
output voltages are easily supported with the 0.6V feedback
reference voltage.
High Efficiency: Up to 96%
600mA Output Current at VIN=3V
2.5V to 5.5V Input Voltage Range
1.5MHz Constant Switching Frequency
No Schottky Diode Required
100% Duty Cycle as Low Dropout Operation
0.6V Reference Voltage Allows 0.6V
Minimum Output Voltage
<1µA Shutdown Mode Supply Current
Current Mode Operation for Excellent Line
and Load Transient Response
Over-temperature Protected
4KV HBM ESD Protection
5-Pin Thin SOT-23 package
APPLICATIONS
The AMC3100 is available in a low profile (1mm) Thin
SOT-23-5L package.
PDA, Personal Media Player
Smart Phone
TYPICAL APPLICATION
Digital Still Camera, Video Camcorder
Portable Instruments
VOUT＝1.8V / 600mA
L
Bluetooth Headset
V
IN＝2.5V to 5.5V
VOUT
SW
VIN
PACKAGE PIN OUT
AMC3100-1.8
COUT
CIN
4.7uF
RUN
10uF
GND
1
2
3
5
V
FB / VOUT*
RUN
GND
SW
4 VIN
SYMBOLIZATION
Device Name
AMC3100DBFT
Output Voltage
Adjustable
Marking
A64A
A642
TSOT-23-5L
( Top View )
AMC3100-1.2DBFT
AMC3100-1.5DBFT
AMC3100-1.8DBFT
1.2V Fixed
* Note: VFB pin for adjustable version.
VOUT pin for fixed voltage version.
1.5V Fixed
A645
1.8V Fixed
A648
ORDER INFORMATION
SOT-23
DB
5-pin
AMC3100DBF
(Adjustable)
AMC3100-X.XDBF (Fixed Voltage)
Note: 1. All surface-mount packages are available in Tape & Reel. Append the letter “T” to part number (i.e. AMC3100-1.8DBFT).
2. The letter ”F” is marked for Lead Free process.
Copyright © 2006 ADDtek Corp.
1
DD010_A -- JUNE 2006
ADDTEK [ ADDTEK CORP ]
