AN30180A Datasheet, PDF (1/17 Pages) Panasonic Semiconductor – VIN = 2.5V to 5.5V 1.2A Synchronous DC-DC Step Down Regulator

AN30180A
VIN = 2.5V to 5.5V
1.2A Synchronous DC-DC Step Down Regulator
FEATURES
z Wide output voltage range : 1.15V to 2.80V
z Input voltage range : 2.5V to 5.5V
z Up to 1200mA Output Current
z Load transient response is fast
z Output current limit control of 1.8A to prevent
Excessive current flows
z High efficiency over a wide load current area by
DCM (discontinuous conductive mode) operation
at light loads, CCM (continuous conductive mode)
operation in heavy loads those two modes can be
automatically switched
z Switching frequency of 2.6MHz during CCM.
z 100% duty operation when input voltage goes
down to output voltage.
z 9 pin Wafer level chip size package (WLCSP Type)
Size : 1.46 × 1.46 mm ( 0.5 mm pitch)
DESCRIPTION
AN30180A is a synchronous DC-DC Step Down
Regulator and employs the hysteretic control system.
By this system, when load current charges suddenly, it
responds at high speed and minimizes the changes of
output voltage.
Since it is possible to use capacitors with small
capacitance and it is unnecessary to add external parts
for system phase compensation, this IC realizes
downsizing of set and reducing in the number of external
parts.
APPLICATIONS
High Current Distributed Power Systems such as
power amplifier in cellular phone etc.
SIMPLIFIED APPLICATION
VIN
4.7 μF x 2
CNT1
CNT2
PVIN
FB
AVIN
1.0 μH
VOUT
LX
AN30180A
4.7 μF
EN
AGND
PGND
Notes) This application circuit is an example. The operation
of mass production set is not guaranteed. You should
perform enough evaluation and verification on the
design of mass production set. You are fully
responsible for the incorporation of the above
application circuit and information in the design of
your equipment.
EFFICIENCY CURVE
100
90
80
70
60
50
40
30
20
10
0
1
10
100
Load Current[mA]
VIN=2.50V
VIN=3.70V
VIN=5.50V
1000
Condition : V_IN=2.5V , 3.7V , 5.5V, Vout=1.15V , Cout=4.7μF , Lout=1.0μH
Publication date: October 2012
1
Ver. AEB