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OCP2161
Dual 1.5MHz, 800mA Synchronous Step-Down Converter
General Description
The OCP2161 contains two independent 1.5MHz
constant frequency, current mode, PWM step-down
converters. Each converter integrates a main switch
and a synchronous rectifier for high efficiency without
an external Schottky diode. The OCP2161 is ideal for
powering portable equipment that runs from a single
cell Lithium-Ion (Li+) battery. Each converter can
supply 800mA of load current from a 2.5V to 6V input
voltage. The output voltage can be regulated as low as
0.6V. The OCP2161 can also run at 100% duty cycle
for low dropout applications.
Pin Configuration
TOP VIEW
Features
Up to 95% Efficiency
1.5MHz Constant Switching Frequency
800mA Load Current on Each Channel
2.5V to 6V Input Voltage Range
Output Voltage as Low as 0.6V
100% Duty Cycle in Dropout
Current Mode Control
Short Circuit Protection
Thermal Fault Protection
<0.1μA Shutdown Current
Internally Compensated
Space Saving 10-Pin QFN Package
Applications
Cellular and Smart Phones
Microprocessors and DSP Core Supplies
PDAs
MP3 Players
Digital Still and Video Cameras
Portable Instruments
Pin Description
Pin Number
Pin Name
1 EN1
2 FB1
3 IN2
4 GND2
5 SW2
6 EN2
7 FB2
8 IN1
9 GND1
10 SW1
Pin Function
Channel 1 Enable Control Input. Drive EN1 above 1.5V to turn on the
Channel 1. Drive EN1 below 0.3V to turn it off (shutdown current < 0.1μA).
Channel 1 Feedback Input. Connect FB1 to the center point of the external
resistor divider. The feedback voltage is 0.6V.
Channel 2 Supply Input. Bypass to GND with a 2.2μF or greater ceramic
capacitor.
Ground 2.
Channel 2 Power Switch Output. Inductor connection to drains of the
internal PFET and NFET switches.
Channel 2 Enable Control Input. Drive EN2 above 1.5V to turn on the
Channel 2. Drive EN2 below 0.3V to turn it off (shutdown current < 0.1μA).
Channel 2 Feedback Input. Connect FB2 to the center point of the external
resistor divider. The feedback voltage is 0.6V.
Channel 1 Supply Input. Bypass to GND with a 2.2μF or greater ceramic
capacitor.
Ground 1.
Channel 1 Power Switch Output. Inductor connection to drains of the
internal PFET and NFET switches.
Page1 - 2
Rev. 1.2 Feb .27, 2018
源于灿瑞 磁传天下

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Typical Application
OCP2161
Dual 1.5MHz, 800mA Synchronous Step-Down Converter
Ordering Information
OCP2161XXX
Package:
Q: DFN-10
Packing:
Blank:Tube or Bulk
A:Tape & Reel
Temperature Grade:
D: -40~85
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Page2 - 2
Rev. 1.2 Feb .27, 2018
源于灿瑞 磁传天下