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OCP2153
1.5MHz, 1.5A Synchronous Step-Down DC-DC Converter
General Description
The OCP2153 is a 1.5MHz constant frequency, high
efficiency, high current, slope compensated current
mode PWM step-down DC-DC converter. The
device integrates a main switch and a synchronous
rectifier for high efficiency without an external
Schottky diode. The OCP2153 can operate from a
2.5V to 5.5V input voltage and is ideal for powering
portable equipment that runs from a single cell
lithium-Ion (Li+) battery. It can supply 1.5A output
current and can also run at 100% duty cycle for low
dropout operation, extending battery life in portable
system. Pulse Skipping Mode operation at light
loads provides very low output ripple voltage for
noise sensitive applications.
The OCP2153 is offered in small profile 6 -Lead DFN
packages, and is available in an adjustable version
and fixed output voltage of 1.2V,1.5V,1.8V and 3.3V.
Applications
Portable Instruments
Digital Cameras
Cellular and Smart Telephones
PDAs
DSP Core Supplies
Pin Configuration
1) DFN-6
(Top View)
VFB/
VOUT
1
6 EN
GND 2
7
EXPOSED PAD
5 SVIN
Features
High Efficiency : Up to 96%
1.5MHz Constant Switching Frequency
1.5A Output Current
2.5V to 5.5V Input Voltage Range
Output Voltages from 0.6V to 5V
Low RDS(ON) Internal Switches: 72mΩ(Typ.)
Available in Fixed Output Voltages of
1.2V,1.5V,1.8V,3.3V and Adjustable Version
Allow use of ceramic capacitors
Current Mode Operation for excellent line and
load transient Response
Short-Circuit Protection
Low Dropout Operation:100% Duty Cycle
Low Shutdown Current: Ishutdown<1μA
Small 6 -Lead DFN Packages
SW 3
4 PVIN
Pin Number
1
2
3
4
5
6
7
Pin Name
VFB/VOUT
GND
SW
PVIN
SVIN
EN
EXPOSED PAD
Pin Function
Feedback Input Pin. It receives the feedback voltage from the external
resistive divider across the output.
Output voltage feedback Pin. An internal resistive divider divides the output
voltage down for comparison to the internal reference voltage.
Ground Pin
Power Switch Output
Power Supply Pin
Signal Supply Pin
Chip Enable ;EN=VIN, Enable; EN=GND, Disable
Power Ground. It must be connect to ground properly.
Page1 - 2
Rev. 1.2 Feb .27, 2018
源于灿瑞 磁传天下

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Ordering Information
Package:
Q: DFN- 6
OCP2153
1.5MHz, 1.5A Synchronous Step-Down DC-DC Converter
OCP2153XXXX
Output Voltage:
Blank: ADJ
12:1.2V
15:1.5V
18:1.8V
33:3.3V
Packing:
Temperature Grade:
Blank:Tube or Bulk D: -40~85
A:Tape & Reel
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Page2 - 2
Rev. 1.2 Feb .27, 2018
源于灿瑞 磁传天下