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M3TEK

IT76620M Datasheet Preview

IT76620M Datasheet

23V/2A High Efficiency Synchronous Rectified Step-Down DC/DC Converter

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M3TEK
IT76620M
23V/2A High Efficiency Synchronous Rectified Step-Down DC/DC Converter
DESCRIPTION
The IT76620M is a high efficiency synchronous
step-down DC/DC converter series with 2A
continuous output current supplied. Included on
the substrate with the features listed is a high
performance trans-conductance error amplifier that
provides tight voltage regulation and accuracy
under transient conditions. A built-in Under Voltage
Lockout (UVLO) circuit is provided to prevent
start-up until the input voltage reaches to 4.5V. In
addition, it features over-current protection and
thermal shutdown. To improve the light load
efficiency, it is designed as the power saving mode
(PSM) to minimize the switching loss by reducing
the switching frequency. The IT76620M is
available in SOP8 package.
FEATURES
Input Voltage Supply Range from 4.5V to 23V
Power Saving Mode (PSM) during the light Load
Operation
High Efficiency up to 93%
Adjustable Output Voltage from 0.925V to 15V
2A Continuous Output Current
330KHz Constant Frequency Operation
Current Mode Operation
Programmable Soft-Start
Over-temperature Protection
Over-current Protection
Input Under Voltage Lockout (UVLO)
10μA Shutdown Current
SOP8 Package
RoHS Compliant (100% Green Available)
APPLICATIONS
Data comm. xDSL CPE Graphics Cards
Set-Top-Box, DVD
Servers/Networking
DSP and FPGA Power Supply
Telecomm Equipments
DC-DC Regulator Modules
LCD Monitor and LCD TV
TYPICAL APPLICATION
Input
4.5 to 23V
Cin
22uF/25V
MLCC
Css
10nF
VIN BS
VSW
EN IT76620M
Cbs
10nF L
10uH
SS
GND
COMP FB
Cs
Cp
Rc
Cout
22uFx2
R1
26.1K
Output
3.3V
Cup
Option
R2
10K
Rev. 0.2
www.m3tekic.com
Figure 1. IT76620M Typical Operating Circuit
M3tekic Confidential
1




M3TEK

IT76620M Datasheet Preview

IT76620M Datasheet

23V/2A High Efficiency Synchronous Rectified Step-Down DC/DC Converter

No Preview Available !

M3TEK
IT76620M
23V/2A High Efficiency Synchronous Rectified Step-Down DC/DC Converter
Ordering Information
Part No.
Marking
IT76620M
IT76620M
YYWW-XXX
XXXXXX
Note: YY:Year WW:Week
Temp. Range
-40°C ~+85°C
Package
SOP8
MOQ
2500/Tape&Reel
Pin Configuration
Pin Description
Pin No.
1
2
3
4
5
6
7
8
Symbol
BST
VIN
SW
GND
FB
COMP
EN
SS
Description
High Side Gate Drive Boost Input
It is required to connect SW and BST by a capacitor, which is able to boost the gate
drive to the internal NMOS above VIN to fully turn it ON.
Power Supply
The input voltage for the power supply is connected to this pin.
Power Switch Output
This is the output of a power MOSFET switch.
Ground
This is the reference of the ground connection for all components in the power Supply.
Voltage Feedback
This is the input to an error amplifier, which drives the PWM controller. It is necessary
to connect this pin to the actual output of power supply to set the DC output voltage.
Compensation
This pin is to compensate the regulation control loop by connecting a series of RC
network from COMP pin to GND pin.
Enable (floating of this pin not recommended )
This input provides an electrical ON/OFF control of the power supply. If the EN pin is
open, it will be pulled to high by the internal circuit.
Soft-Start
This pin is connected to an external capacitor, which is between the SS pin and GND
to control soft-start time.
This externally connected 0.1μF capacitor is able to set the soft-start period to 28ms.
Rev. 0.2
www.m3tekic.com
M3tekic Confidential
2


Part Number IT76620M
Description 23V/2A High Efficiency Synchronous Rectified Step-Down DC/DC Converter
Maker M3TEK
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