AN30185A Datasheet, PDF (1/28 Pages) Panasonic Semiconductor – VIN = 2.9V to 5.5V 2ch,0.8A General-purpose High Efficiency Power LSI

AN30185A
VIN = 2.9V to 5.5V 2ch,0.8A
General-purpose High Efficiency Power LSI
FEATURES
DESCRIPTION
z High-speed response DC-DC Step-Down Regulator
circuit that employs hysteretic control system :
2-ch (1.0 V, 0.8 A / 1.8 V, 0.8 A)
z LDO : 1-ch (0.9 V, 10 mA)
z Built-in external Pch MOSFET gate drive circuits
z Built-in Reset function
z Built-in Under Voltage Lockout function (UVLO)
z 24pin Plastic Quad Flat Non-leaded Package
(Size : 4 × 4 mm, 0.5 mm pitch)
APPLICATIONS
High Current Distributed Power Systems such as
SSD (Solid State Drive), Cellular Phone, etc.
AN30185A is a power management LSI which has
DC-DC step down regulators (2-ch) that employs
hysteretic control system.
By this system, when load current changes 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 use parts for phase
compensation, this IC realizes downsizing of set and
reducing in the number of external parts.
Output voltages are 1.0 V and 1.8 V. Each maximum
current is 0.8 A.
This LSI has a LDO circuit, external Pch-MOSFET gate
drive circuits and a reset circuit of input power supply
voltage.
SIMPLIFIED APPLICATION
3.3V
3.3V
10 kΩ
PVIN1
4.7 μF
PVIN2
AVIN
4.7 μF
4.7 μF
EN
PVIN1
EN2 RESET PCNT
DIS
FB1
LX1
PVIN2
AN30185A ^FB2
LX2
AVIN
BUF
VREG AGND1 AGND2 PGND1 PGND2
2.2 μH
2.2 μH
1.0 μF
1.0 μF
VOUT1
10 μF
VOUT2
10 μF
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.
Publication date: October 2012
1
EFFICIENCY CURVE
[DC-DC1]
90
85
80
75
70
65
60
55
50
45
40
1
10
100
load current [mA]
VIN=3.3V
VIN=5V
1000
Condition : V_IN=3.3V or 5.0V , Vout=1.0V , Cout=10μF , Lout=2.2μH
[DC-DC2]
100
95
90
85
80
75
70
65
60
55
50
1
VIN=3.3V
VIN=5V
10
100
load current [mA]
1000
Condition : V_IN=3.3V or 5.0V , Vout=1.8V , Cout=10μF , Lout=2.2μH
Ver. BEB