IR3820MTR1PBF

IR3820MTR1PBF Datasheet

IR3820MPbF

Part	Datasheet
IR3820MTR1PBF	IR3820MTR1PBF (pdf)

Related Parts	Information
IR3820MTRPBF	IR3820MTRPBF

PDF Datasheet Preview
PD-60329 IR3820MPbF SupIRBuckTM HIGHLY INTEGRATED 12A WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR • Wide Input Voltage Range 2.5V to 21V • Wide Output Voltage Range 0.6V to 12V • Continuous 12A Load Capability • 600kHz High Frequency Operation • Programmable Over-Current Protection • Programmable PGood Output • Hiccup Current Limit • Precision Reference Voltage 0.6V • Programmable Soft-Start • Pre-Bias Start-up • Thermal Protection • Thermally Enhanced Package • Small Size 5mmx6mm QFN • Pb-Free RoHS Compliant • Distributed Point-of-Loads • Server and Workstations • Embedded Systems • Storage Systems • DDR Applications • Graphics Cards • Game Consoles • Computing Peripheral Voltage Regulators The IR3820 SupIRBuckTM is an easy-to-use, fully integrated and highly efficient DC/DC regulator. The onboard switching controller and MOSFETs make the IR3820 a space-efficient solution, providing accurate power delivery for low output voltage applications. The IR3820 operates from a single 4.5V to 14V input supply and generates an output voltage adjustable from 0.6V to 0.75*Vin at loads up to 12A. A versatile regulator offering programmability of startup time, power good threshold and current limit, the IR3820’s fixed 600kHz switching frequency allows the use of small external components. The IR3820 also features important protection functions, such as Pre-Bias startup, hiccup current limit and thermal shutdown to provide the required system level security in the event of fault conditions. Fig. Typical application diagram 11/04/08 PD-60329 IR3820MPbF ABSOLUTE MAXIMUM RATINGS Voltages referenced to GND • VIN Supply Voltage • Vcc Supply Voltage -0.3V to 24V -0.3V to 16V • Vc Supply Voltage -0.3V to 30V • SW -0.3V to 30V • PGood -0.3V to 16V • Fb,COMP,SS,Vsns -0.3V to 3.5V • OCSet 10mA • AGnd to PGnd -0.3V to +0.3V • Storage Temperature Range -65°C To 150°C • Operating Junction Temperature Range -40°C To 150°C • ESD Classification JEDEC, JESD22-A114 • Moisture Sensitivity Level JEDEC Level 3 260oC Caution Stresses beyond those listed under “Absolute Maximum Rating” 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 in the operational sections of the specifications is not implied. Exposure to “Absolute Maximum Rating” conditions for extended periods may affect device reliability. ORDERING INFORMATION PACKAGE DESIGNATOR PACKAGE DESCRIPTION IR3820MTRPbF IR3820MTR1PbF PIN COUNT PARTS PER REEL 4000 750 Block Diagram PD-60329 IR3820MPbF Fig. Simplified block diagram of the IR3820. 11/04/08 PD-60329 IR3820MPbF Pin Description Pin Name 1 Vsns PGood sense pin. Use two external resistors to program the power good threshold. Fb Inverting input to the error amplifier. This pin is connected directly to the output of the regulator via resistor divider to set the output voltage and provide feedback to the error amplifier. 3 Comp Output of error amplifier. 4 AGnd Signal ground for internal reference and control circuitry. 5 AGnd Signal ground for internal reference and control circuitry. 6 SS/SD Soft start / shutdown. This pin provides user programmable soft-start function. Connect an external capacitor from this pin to signal ground AGnd to set the start up time of the output voltage. The converter can be shutdown by pulling this pin below 0.3V. 7 OCSet Current limit set point. A resistor from this pin to SW pin will set the current limit threshold. VCC This pin provides biasing voltage for the internal blocks of the IC. It also powers the low side driver. A minimum of 0.1uF, high frequency capacitor must be connected from this pin to power ground PGnd . 9 PGood Power Good status pin. Output is open collector. Connect a pull up resistor from this pin to Vcc. 10 PGnd Power Ground. This pin serves as a separated ground for the MOSFET drivers and should be connected to the system’s power ground plane. 11 SW Switch node. This pin is connected to the output inductor 12 VIN Input voltage connection pin 13 HG This pin is connected to the high side Mosfet gate. Connect a small capacitor from this pin to switch node SW . 14 VC This pin powers the high side driver and must be connected to a voltage higher than input voltage. A minimum of 0.1uF high frequency capacitor must be connected from this pin to the power ground PGnd . 15 AGnd Signal ground for internal reference and control circuitry. Pins 4, 5 and 15 need to be connected together on system board. 11/04/08 Recommended Operating Conditions PD-60329

PDF Datasheet Preview

PD-60329

IR3820MPbF

SupIRBuckTM

HIGHLY INTEGRATED 12A

WIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATOR
• Wide Input Voltage Range 2.5V to 21V
• Wide Output Voltage Range 0.6V to 12V
• Continuous 12A Load Capability
• 600kHz High Frequency Operation
• Programmable Over-Current Protection
• Programmable PGood Output
• Hiccup Current Limit
• Precision Reference Voltage 0.6V
• Programmable Soft-Start
• Pre-Bias Start-up
• Thermal Protection
• Thermally Enhanced Package
• Small Size 5mmx6mm QFN
• Pb-Free RoHS Compliant
• Distributed Point-of-Loads
• Server and Workstations
• Embedded Systems
• Storage Systems
• DDR Applications
• Graphics Cards
• Game Consoles
• Computing Peripheral Voltage Regulators

The IR3820 SupIRBuckTM is an easy-to-use, fully integrated and highly efficient DC/DC regulator. The onboard switching controller and MOSFETs make the IR3820 a space-efficient solution, providing accurate power delivery for low output voltage applications.

The IR3820 operates from a single 4.5V to 14V input supply and generates an output voltage adjustable from 0.6V to 0.75*Vin at loads up to 12A.

A versatile regulator offering programmability of startup time, power good threshold and current limit, the IR3820’s fixed 600kHz switching frequency allows the use of small external components.

The IR3820 also features important protection functions, such as Pre-Bias startup, hiccup current limit and thermal shutdown to provide the required system level security in the event of fault conditions.

Fig. Typical application diagram
11/04/08

PD-60329

IR3820MPbF

ABSOLUTE MAXIMUM RATINGS

Voltages referenced to GND
• VIN Supply Voltage
• Vcc Supply Voltage
-0.3V to 24V -0.3V to 16V
• Vc Supply Voltage
-0.3V to 30V
• SW
-0.3V to 30V
• PGood
-0.3V to 16V
• Fb,COMP,SS,Vsns
-0.3V to 3.5V
• OCSet
10mA
• AGnd to PGnd
-0.3V to +0.3V
• Storage Temperature Range
-65°C To 150°C
• Operating Junction Temperature Range
-40°C To 150°C
• ESD Classification

JEDEC, JESD22-A114
• Moisture Sensitivity Level

JEDEC Level 3 260oC

Caution Stresses beyond those listed under “Absolute Maximum Rating” 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 in the operational sections of the specifications is not implied. Exposure to “Absolute Maximum Rating” conditions for extended periods may affect device reliability.
ORDERING INFORMATION

PACKAGE DESIGNATOR

PACKAGE DESCRIPTION

IR3820MTRPbF

IR3820MTR1PbF

PIN COUNT

PARTS PER REEL
4000 750

Block Diagram

PD-60329

IR3820MPbF

Fig. Simplified block diagram of the IR3820.
11/04/08

PD-60329

IR3820MPbF

Pin Description

Pin Name
1 Vsns PGood sense pin. Use two external resistors to program the power good threshold.

Fb Inverting input to the error amplifier. This pin is connected directly to the
output of the regulator via resistor divider to set the output voltage and
provide feedback to the error amplifier.
3 Comp Output of error amplifier.
4 AGnd Signal ground for internal reference and control circuitry.
5 AGnd Signal ground for internal reference and control circuitry.
6 SS/SD Soft start / shutdown. This pin provides user programmable soft-start function. Connect an external capacitor from this pin to signal ground AGnd to set the start up time of the output voltage. The converter can be shutdown by pulling this pin below 0.3V.
7 OCSet Current limit set point. A resistor from this pin to SW pin will set the current limit threshold.

VCC This pin provides biasing voltage for the internal blocks of the IC. It also
powers the low side driver. A minimum of 0.1uF, high frequency
capacitor must be connected from this pin to power ground PGnd .
9 PGood Power Good status pin. Output is open collector. Connect a pull up
resistor from this pin to Vcc.
10 PGnd Power Ground. This pin serves as a separated ground for the MOSFET drivers and should be connected to the system’s power ground plane.
11 SW Switch node. This pin is connected to the output inductor
12 VIN Input voltage connection pin
13 HG This pin is connected to the high side Mosfet gate. Connect a small capacitor from this pin to switch node SW .
14 VC This pin powers the high side driver and must be connected to a voltage higher than input voltage. A minimum of 0.1uF high frequency capacitor must be connected from this pin to the power ground PGnd .
15 AGnd Signal ground for internal reference and control circuitry.

Pins 4, 5 and 15 need to be connected together on system board.
11/04/08

Recommended Operating Conditions

PD-60329

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Datasheet ID: IR3820MTR1PBF 639019