AMC3100
www.addmtek.com
DESCRIPTION
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.
The AMC3100 is available in a low profile (1mm) Thin
SOT-23-5L package.
TYPICAL APPLICATION
V
OUT
＝1.8V
/ 600mA
L
V
IN
＝2.5V
to 5.5V
VIN
SW
V
OUT
1.5MHz, 600mA S
YNCHRONOUS
S
TEP-
D
OWN
C
ONVERTER
FEATURES
High Efficiency: Up to 96%
600mA Output Current at V
IN
=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
PDA, Personal Media Player
Smart Phone
Digital Still Camera, Video Camcorder
Portable Instruments
Bluetooth Headset
PACKAGE PIN OUT
C
OUT
10uF
AMC3100-1.8
C
IN
4.7uF
RUN
GND
RUN
1
GND
2
SW
3
5
V
FB
/ V
OUT
*
A64X
4
VIN
SYMBOLIZATION
Device Name
Output Voltage
AMC3100DBFT
AMC3100-1.2DBFT
AMC3100-1.5DBFT
AMC3100-1.8DBFT
Adjustable
1.2V Fixed
1.5V Fixed
1.8V Fixed
Marking
A64A
A642
A645
A648
TSOT-23-5L
( Top View )
* Note: V
FB
pin for adjustable version.
V
OUT
pin for fixed voltage version.
DB
ORDER INFORMATION
SOT-23
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.
1
DD010_A
-- JUNE 2006
Copyright
©
2006 ADDtek Corp.
ADDTEK [ ADDTEK CORP ]
