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AP3211

DIODES
Part Number AP3211
Manufacturer DIODES
Description 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER
Published May 3, 2023
Detailed Description AP3211 1.4MHZ,1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER Description The AP3211 is a 1.4MHz fixed frequency, current mode, ...
Datasheet PDF File AP3211 PDF File

AP3211
AP3211

Overview
AP3211 1.
4MHZ,1.
5A ASYNCHRONOUS DC-DC BUCK CONVERTER Description The AP3211 is a 1.
4MHz fixed frequency, current mode, PWM buck (step-down) DC-DC converter, capable of driving a 1.
5A load with high efficiency, excellent line and load regulation.
The device integrates N-channel power MOSFET switch with low on-resistance.
Current mode control provides fast transient response and cycle-bycycle current limit.
A standard series of inductors are available from several different manufacturers optimized for use with the AP3211.
This feature greatly simplifies the design of switch-mode power supplies.
The AP3211 is available in SOT-23-6 package.
Pin Assignments (Top View) Pin 1 Mark BS 1 GND 2 6 SW 5 IN Features  Input Voltage Range: 4.
5V to 18V  Output Voltage Adjustable from 0.
81V to 15V  Fixed 1.
4MHz Frequency  High Efficiency: up to 92%  Output Current: 1.
5A  Current Mode Control  Built-In Over Current Protection  Built-In Thermal Shutdown Function  Built-In UVLO Function  Built-In Over Voltage Protection  Built-In Soft-Start FB 3 4 EN Applications  LCD TV  DPF  Portable DVD SOT-23-6 Typical Applications Circuit AP3211 VIN=12V IN BS 10mF C1 25V SW ON OFF EN FB GND CB 10nF L1 4.
7mH D1 R1 C2 49.
9k VOUT=3.
3V (1.
5A) 22mF 6.
3V R2 16.
3k AP3211 Document number: DS41396 Rev.
2 - 2 1 of 11 www.
diodes.
com September 2018 © Diodes Incorporated AP3211 Pin Descriptions Pin Number 1 2 3 Pin Name BS GND FB 4 EN 5 IN 6 SW Function Bootstrap pin.
A bootstrap capacitor is connected between the BS pin and SW pin.
The voltage across the bootstrap capacitor drives the internal high-side NMOS switch.
Ground pin Feedback pin.
This pin is connected to an external resistor divider to program the system output voltage.
When VFB exceeds 20% of the nominal regulation value of 0.
81V, the OVP is triggered.
When VFB < 0.
25V, the oscillator frequency is lowered to realize short circuit protection.
Control input pin.
Forcing this pin above 1.
5V enables...


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