AP3406K-ADJTRG1

AP3406K-ADJTRG1 Datasheet

1.1MHz, 650mA SYNCHRONOUS DC-DC BUCK CONVERTER AP3406

Part	Datasheet
AP3406K-ADJTRG1	AP3406K-ADJTRG1 (pdf)

Related Parts	Information
AP3406KT-ADJTRG1	AP3406KT-ADJTRG1

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Data Sheet 1.1MHz, 650mA SYNCHRONOUS DC-DC BUCK CONVERTER AP3406 The AP3406 is a 1.1MHz fixed frequency, current mode, PWM synchronous buck step-down DC-DC converter, capable of driving a 650mA load with high efficiency, excellent line and load regulation. The device integrates a main switch and a synchronous switch without an external Schottky diode. It is ideal for powering portable equipment that runs from a single Li-ion battery. A standard series of inductors are available from several different manufacturers optimized for use with the AP3406. This feature greatly simplifies the design of switch-mode power supplies. This IC is available in TSOT-23-5 and SOT-23-5 packages. • High Efficiency up to 95% • Output Current 650mA • Input Voltage Range 2.5V to 5.5V • Fixed 1.1MHz Frequency • Current Mode Control • 100% Duty Cycle in Dropout • Built-in Short Circuit Protection • Built-in Thermal Shutdown Function • Built-in Current Limit Function • Shutdown Current <1uA • GPS • WiFi Card • Portable Media Player • Digital Still and Video Cameras TSOT-23-5 SOT-23-5 Figure Package Types of AP3406 BCD Semiconductor Manufacturing Limited 1 Data Sheet 1.1MHz, 650mA SYNCHRONOUS DC-DC BUCK CONVERTER AP3406 Pin Configuration KT/K Package TSOT-23-5/SOT-23-5 EN 1 GND 2 5 FB 4 VIN Figure Pin Configuration of AP3406 Top View Pin Description Pin Number 2 3 4 5 Pin Name GND SW VIN FB Function Control input pin. Forcing this pin above 1.5V enables the IC. Forcing this pin below 0.6V shuts down the IC. When the IC is in shutdown mode, all functions are disabled to decrease the supply current below 1uA Ground pin Power switch output pin. Inductor connection to drain of the internal PFET and NFET switches Supply input pin. Bypass to GND with a 4.7uF or greater ceramic capacitor Feedback pin. Connect it with an external resistor divider network to program the system output voltage BCD Semiconductor Manufacturing Limited 2 Data Sheet 1.1MHz, 650mA SYNCHRONOUS DC-DC BUCK CONVERTER AP3406 Functional Block Diagram Shutdown Slope Control Compensation Oscillator VREF with 0.6V Soft Start Error Amplifier Current Limit Detector Current Sense Ordering Information AP3406 Circuit Type Package KT TSOT-23-5 K SOT-23-5 G1 Green TR Tape & Reel ADJ Adjustable Voltage Package TSOT-23-5 SOT-23-5 Temperature Range -40 to 85°C -40 to 85°C Green AP3406KT-ADJTRG1 AP3406K-ADJTRG1 Marking ID Green L1B FBC Packing Type Tape & Reel 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 Data Sheet 1.1MHz, 650mA SYNCHRONOUS DC-DC BUCK CONVERTER AP3406 Absolute Maximum Ratings Note 1 Parameter Input Voltage Feedback Voltage EN Pin Voltage SW Pin Voltage Thermal Resistance Operating Junction Temperature Storage Temperature Lead Temperature Soldering, 10sec VIN VFB VEN VSW TJ TSTG TLEAD Value to VIN to VIN+0.3 to VIN+0.3 TSOT-23-5 SOT-23-5 -65 to 150 Unit ºC/W ºC ºC ºC 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 Maximum Output Current Operating Ambient Temperature VIN IOUT MAX 650 -40

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Data Sheet
1.1MHz, 650mA SYNCHRONOUS DC-DC BUCK CONVERTER AP3406

The AP3406 is a 1.1MHz fixed frequency, current mode, PWM synchronous buck step-down DC-DC converter, capable of driving a 650mA load with high efficiency, excellent line and load regulation. The device integrates a main switch and a synchronous switch without an external Schottky diode. It is ideal for powering portable equipment that runs from a single Li-ion battery.

A standard series of inductors are available from several different manufacturers optimized for use with the AP3406. This feature greatly simplifies the design of switch-mode power supplies.

This IC is available in TSOT-23-5 and SOT-23-5 packages.
• High Efficiency up to 95%
• Output Current 650mA
• Input Voltage Range 2.5V to 5.5V
• Fixed 1.1MHz Frequency
• Current Mode Control
• 100% Duty Cycle in Dropout
• Built-in Short Circuit Protection
• Built-in Thermal Shutdown Function
• Built-in Current Limit Function
• Shutdown Current <1uA
• GPS
• WiFi Card
• Portable Media Player
• Digital Still and Video Cameras

TSOT-23-5

SOT-23-5

Figure Package Types of AP3406

BCD Semiconductor Manufacturing Limited 1

Data Sheet
1.1MHz, 650mA SYNCHRONOUS DC-DC BUCK CONVERTER AP3406

Pin Configuration

KT/K Package TSOT-23-5/SOT-23-5

EN 1 GND 2
5 FB 4 VIN

Figure Pin Configuration of AP3406 Top View

Pin Description

Pin Number
2 3 4 5

Pin Name

GND SW VIN FB

Function

Control input pin. Forcing this pin above 1.5V enables the IC. Forcing this pin below 0.6V shuts down the IC. When the IC is in shutdown mode, all functions are disabled to decrease the supply current below 1uA

Ground pin

Power switch output pin. Inductor connection to drain of the internal PFET and NFET switches

Supply input pin. Bypass to GND with a 4.7uF or greater ceramic capacitor

Feedback pin. Connect it with an external resistor divider network to program the system output voltage

BCD Semiconductor Manufacturing Limited 2

Data Sheet 1.1MHz, 650mA SYNCHRONOUS DC-DC BUCK CONVERTER AP3406 Functional Block Diagram

Shutdown

Slope

Control Compensation

Oscillator

VREF with 0.6V

Soft Start

Error

Amplifier

Current Limit Detector

Current Sense
Ordering Information

AP3406

Circuit Type

Package KT TSOT-23-5 K SOT-23-5

G1 Green TR Tape & Reel ADJ Adjustable Voltage

Package

TSOT-23-5 SOT-23-5

Temperature Range
-40 to 85°C -40 to 85°C

Green

AP3406KT-ADJTRG1 AP3406K-ADJTRG1

Marking ID

Green

L1B FBC

Packing Type

Tape & Reel 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

Data Sheet 1.1MHz, 650mA SYNCHRONOUS DC-DC BUCK CONVERTER AP3406 Absolute Maximum Ratings Note 1

Parameter

Input Voltage Feedback Voltage EN Pin Voltage SW Pin Voltage

Thermal Resistance

Operating Junction Temperature Storage Temperature Lead Temperature Soldering, 10sec

VIN VFB VEN VSW

TJ TSTG TLEAD

Value
to VIN
to VIN+0.3
to VIN+0.3

TSOT-23-5

SOT-23-5
-65 to 150

Unit
ºC/W
ºC ºC ºC

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 Maximum Output Current Operating Ambient Temperature

VIN IOUT MAX
650 -40

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Datasheet ID: AP3406K-ADJTRG1 509844