IP1837 datasheet(1/40 Pages) IRF

Teilenummer	IP1837

Bauteilbeschribung	Highly Integrated 35A Single?릋nput Voltage, Synchronous Buck Regulator

PDF	40 Pages

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Hersteller	IRF [International Rectifier]

Direct Link	http://www.irf.com

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iP1837

Highly Integrated 35A Single‐input Voltage,

Synchronous Buck Regulator

March 5, 2012 | V1.26

1

97600

FEATURES

 Wide input application 1.5V―16V

 Single 3.3V or single 5V application

 Output Voltage Range: 0.6V to 0.75*Vin

 0.5% accurate Reference Voltage

 Programmable Switching Frequency up to 1.5MHz

 Programmable Soft‐Start

 Enable input with Voltage Monitoring Capability

 Remote Sense Amplifier with True Converter

Voltage Sensing

 Thermally compensated Hiccup Mode

Over Current Protection

 Over‐voltage protection

 Pre‐Bias Start up

 Body Braking to improve transient

 Integrated MOSFET drivers and Bootstrap diode

 Operating temp: ‐40oC<Tj<125oC

 Thermal Shut Down

 Power Good Output with Window Comparator

 Small Size 7.7mmx7.7mm LGA

 Halogen Free, Pb‐Free and RoHS Compliant

BASIC APPLICATION

Figure 1 : iP1837 Basic Application Circuit

DESCRIPTION

The iP1837 iPOWIR

TM is an easy‐to‐use, fully integrated

and highly efficient DC/DC regulator. The onboard PWM

controller and MOSFETs make iP1837 a space‐efficient

solution, providing accurate power delivery for low output

voltage and high current applications.

iP1837 is a versatile regulator which offers programmability

of switching frequency and current limit while operating in

wide input and output voltage range.

The switching frequency is programmable from 250kHz to

1.5MHz for an optimum solution.

It also features important protection functions, such as

Pre‐Bias startup, hiccup current limit and thermal

shutdown to give required system level security in the

event of fault conditions.

APPLICATIONS

 Server Application

 Netcom Applications

 Embedded Telecom Systems

 Distributed Point of Load Power Architectures

87

88

89

90

91

92

93

94

95

96

97

3.5

7

10.5

14

17.5

21

24.5

28

31.5

35

Iout (A)

Vo=3.3V

Vo=1.8V

Vin=12V

Vcc=3.3V

Room Temperature

200 LFM airflow

Includes biasing loss as well as inductor

losses and stray PCB losses

Figure 2: iP1837 Efficiency

iP1837

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