AP3211HK-G1

AP3211HK-G1 Datasheet

1.4MHz, 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER AP3211H

Part	Datasheet
AP3211HK-G1	AP3211HK-G1 (pdf)

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Preliminary Datasheet 1.4MHz, 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER AP3211H The AP3211H 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-by-cycle current limit. A standard series of inductors are available from several different manufacturers optimized for use with the AP3211H. This feature greatly simplifies the design of switch-mode power supplies. The AP3211H is available in SOT-23-6 package. • Input Voltage Range 4.5V to 23V • 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 • LCD TV • DPF • Portable DVD SOT-23-6 Figure Package Type of AP3211H BCD Semiconductor Manufacturing Limited 1 Preliminary Datasheet 1.4MHz, 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER AP3211H Pin Configuration K Package SOT-23-6 Pin 1 Mark BS 1 GND 2 6 SW 5 IN 4 EN Figure Pin Configuration of AP3211H Top View Pin Description Pin Number Pin Name BS GND FB EN IN 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 the IC. Forcing this pin below 0.4V shuts down the IC. When the IC is in shutdown mode, all functions are disabled to decrease the supply current below 1uA Supply input pin. A capacitor should be connected between the IN pin and GND pin to keep the DC input voltage constant Power switch output pin. This pin is connected to the inductor and bootstrap capacitor BCD Semiconductor Manufacturing Limited 2 Preliminary Datasheet 1.4MHz, 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER AP3211H Functional Block Diagram HICCUP SCHOTTKY VREF BOOSTRAP REGULATOR GND 2 VDD/VDD1 REGULATOR OSC MHz/ 460 KHz RAMP GENERATOR 2A/V CS 3.3V REFERENCE VOLTAGE 27pF 220k ERR AMP VLIMIT OSC S Q PWM COMPARATOR Ordering Information AP3211H Circuit Type Package K SOT-23-6 G1 Green TR Tape & Reel Package SOT-23-6 Temperature Range -40 to 85°C AP3211HKTR-G1 Marking ID Packing Type Tape & Reel BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green. BCD Semiconductor Manufacturing Limited 3 Preliminary Datasheet 1.4MHz, 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER AP3211H Absolute Maximum Ratings Note 1 Parameter Input Pin Voltage EN Pin Voltage SW Pin Voltage Bootstrap Pin Voltage Feedback Pin Voltage Operating Junction Temperature Storage Temperature Lead Temperature Soldering, 10sec Thermal Resistance Junction to Ambient VIN VEN VSW VBS VFB TJ TSTG TLEAD Value to 25 to VIN+0.3 26 to VSW+6 to 6 150 -65 to 150 260 Unit V ºC ºC ºC ºC/W Note 1 Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Recommended Operating Conditions Parameter Input Voltage Operating Ambient Temperature VIN TA 23 85

PDF Datasheet Preview

Preliminary Datasheet
1.4MHz, 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER AP3211H

The AP3211H 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-by-cycle current limit.

A standard series of inductors are available from several different manufacturers optimized for use with the AP3211H. This feature greatly simplifies the design of switch-mode power supplies.

The AP3211H is available in SOT-23-6 package.
• Input Voltage Range 4.5V to 23V
• 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
• LCD TV
• DPF
• Portable DVD

SOT-23-6

Figure Package Type of AP3211H

BCD Semiconductor Manufacturing Limited 1

Preliminary Datasheet 1.4MHz, 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER AP3211H Pin Configuration

K Package SOT-23-6

Pin 1 Mark

BS 1 GND 2
6 SW 5 IN 4 EN

Figure Pin Configuration of AP3211H Top View

Pin Description

Pin Number

Pin Name

BS GND FB

EN IN 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 the IC. Forcing this pin below 0.4V shuts down the IC. When the IC is in shutdown mode, all functions are disabled to decrease the supply current below 1uA Supply input pin. A capacitor should be connected between the IN pin and GND pin to keep the DC input voltage constant Power switch output pin. This pin is connected to the inductor and bootstrap capacitor

BCD Semiconductor Manufacturing Limited 2

Preliminary Datasheet 1.4MHz, 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER AP3211H Functional Block Diagram

HICCUP

SCHOTTKY

VREF

BOOSTRAP

REGULATOR

GND 2

VDD/VDD1 REGULATOR

OSC MHz/ 460 KHz

RAMP GENERATOR
2A/V CS
3.3V

REFERENCE VOLTAGE
27pF 220k ERR AMP

VLIMIT

OSC S Q

PWM COMPARATOR
Ordering Information

AP3211H

Circuit Type

Package K SOT-23-6

G1 Green TR Tape & Reel

Package

SOT-23-6

Temperature Range
-40 to 85°C

AP3211HKTR-G1

Marking ID

Packing Type

Tape & Reel

BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green.

BCD Semiconductor Manufacturing Limited 3

Preliminary Datasheet
1.4MHz, 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER AP3211H

Absolute Maximum Ratings Note 1

Parameter

Input Pin Voltage

EN Pin Voltage

SW Pin Voltage

Bootstrap Pin Voltage

Feedback Pin Voltage

Operating Junction Temperature

Storage Temperature Lead Temperature Soldering, 10sec Thermal Resistance Junction to Ambient

VIN VEN VSW VBS VFB TJ TSTG TLEAD

Value
to 25 to VIN+0.3
26 to VSW+6
to 6 150
-65 to 150 260

Unit

V ºC ºC ºC
ºC/W

Note 1 Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.

Recommended Operating Conditions

Parameter

Input Voltage Operating Ambient Temperature

VIN TA
23 85

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Datasheet ID: AP3211HK-G1 509843