BUCK CONVERTER. AMS4106 Datasheet

AMS4106 CONVERTER. Datasheet pdf. Equivalent

Part AMS4106
Description 5A SYNCHRONUS PWM BUCK CONVERTER
Feature www.DataSheet4U.com Advanced Monolithic Systems FEATURES • Internal MOSFET driver with Integrated H.
Manufacture Advanced Monolithic Systems
Datasheet
Download AMS4106 Datasheet



AMS4106
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Advanced
Monolithic
Systems
FEATURES
Internal MOSFET driver with Integrated High Side
Uses External Low Side MOSFET
Adjustable output voltage dawn to 0.600V
External Clock Synchronization
Built in Start/Stop UVLO
Over Current and Thermal Protection
Shutdown supply current < 1uA
Frequency range 100KHz to 750KHz
AMS4106
5A SYNCHRONUS PWM BUCK CONVERTER
RoHS compliant
APPLICATIONS
LCD TVs and LCD monitors
Computer Peripherals
Portable (Notebook) Computers
Industrial power supply
Point of regulation for high performance electronics
Consumer Electronics
Audio Power Amplifiers
GENERAL DESCRIPTION
The AMS4106 is a medium output current synchronous buck converter. The high side device is integrated into the device. The
AMS4106 provides an adaptive gate drive for the external FET. For low current operation this can be replaced with a Schottky
diode allowing asynchronous operation. The part has either a fixed internal present PWM frequency of 250 kHz, or externally
adjustable up to 600 kHz, allowing smaller inductors where efficiency is less critical and faster transient response is needed.
The part uses current mode control for simple compensation and ease of use with low ESR capacitors. It uses a programmable
soft start to reduce inrush current and allow large output capacitors to be used where very low ripple is required. The part has
enable pin with virtual zero power in shutdown mode. A power good is provided with open collector to facilitate power ready
functions. The part is available in SOIC 16 thermally enhanced packages.
ORDERING INFORMATION
OUTPUT PACKAGE TYPE
TEMP.
VOLTAGE
Adjustable
16 Lead SOIC
AMS4106S
RANGE
-25ºC to 125ºC
TYPICAL APPLICATION
PIN CONNECTIONS
16 Lead SOIC
(S)
PWRGD 1
SS 2
GND 3
VPWR 4
VPWR 5
VIN 6
COMP 7
F/B 8
16 FDR
15 PGND
14 LX
13 LX
12 LX
11 BST
10 ENABLE
9 F SET
Top View
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723



AMS4106
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PIN DESCRIPTION
AMS4106
PIN
NUMBERS
1
NAME
PWRGD
2 SS
3 GND
4, 5 VPWR
6 VIN
7
8
9
10
11
12, 13, 14
15
COMP
F/B
F SET
ENABLE
BST
LX
PGND
16 FDR
AMS4106
DESCRIPTION
Power good output. Open collector output. A low on the pin indicates that the output is less
than the desired output voltage. There is an internal rising filter on the output of the
PWRGD comparator.
Soft start pin connect a capacitor to GND, to slow the start up.
Analog ground-internally connected to the sensitive analog ground circuitry.
Input supply voltage, 4.5 V to 20 V. Must bypass with a low ESR 10–µF ceramic capacitor.
Input supply voltage, 4.5 V to 20 V powers up the internal circuitry. Must bypass with a
low ESR 10–µF ceramic capacitor.
Error amplifier output. Connect frequency compensation network from COMP to GND.
Input pin of the error comparator.
External frequency set 100 Khz-750Khz.
Logic enable/disable device function.
Boost voltage for the output stage drive. Connect a capacitor between LX pin and Boost.
Phase node- Connect to external FET and external L-C filter.
Power Ground-Noisy internal ground-Return currents from the FDR driver output return
through the PGND
Gate drive for low side MOSFET. Connect gate of n-channel MOSFET.
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723





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