Datasheet > ISL95833B

ISL95833B

更新时间： 2023-12-20 18:46:11

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
2页	199K
描述
Dual 2+1 PWM Controller for IMVP-7/VR12 CPUs

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ISL95833B 数据手册

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To request the full datasheet, please visit www.intersil.com/products/isl95833b

ISL95833B

FN8561

Rev 0.00

June 24, 2013

Dual 2+1 PWM Controller for IMVP-7/VR12 CPUs

The ISL95833B Pulse Width Modulation (PWM) controller IC

provides a complete solution for IMVP-7/VR12™ compliant

microprocessor and graphic processor core power supplies. It

provides the control and protection for two Voltage Regulators

Features

• Serial data bus

• Dual outputs:

(VRs). The first VR, typically for V

, incorporates 1

CORE

- Configurable 2- or 1-phase for the 1st output using one

integrated gate driver

integrated driver and can operate in 2- or 1-phase

configurations. The second VR, typically for graphics, is a

single phase regulator incorporating an integrated driver. The

two VRs share a serial control bus to communicate with the

CPU and achieve lower cost and smaller board area compared

with the two-chip approach.

- 1-phase for the 2nd output using an integrated gate driver

• R3™ Modulator

- Excellent transient response

- High light load efficiency

Both VRs utilize Intersil's Robust Ripple Regulator

R3 Technology™. The R3 modulator has numerous advantages

compared to traditional modulators, including faster transient

response, variable switching frequency during load transients,

and improved light load efficiency due to its ability to

automatically change switching frequency.

• 0.5% system accuracy over-temperature

• Supports multiple current sensing methods

- Lossless inductor DCR current sensing

- Precision resistor current sensing

• Differential remote voltage sensing

The ISL95833B has several other key features. Both outputs

support either DCR current sensing with a single NTC

thermistor for DCR temperature compensation, or more

precise resistor current sensing if desired. Both outputs come

with remote voltage sense, programmable VBOOT voltage,

IMAX, and switching frequency, adjustable overcurrent

protection and separate Power-Good signals.

• Programmable VBOOT voltage at start-up

• Resistor programmable IMAX and switching frequency

(400kHz ~ 600kHz) for both outputs

• Adaptive body diode conduction time reduction

Applications

• IMVP-7/VR12 compliant computers

V_IN

VR2

V_IN

0.91

= 19V

0.90

0.89

0.88

0.87

0.86

0.85

0.84

0.83

0.82

0.81

0.80

VR1

ISL6208

DRIVER

ISL95833B

V_IN

= 12V

= 8V

24 30

(A)

OUT

FIGURE 1. SIMPLIFIED APPLICATION CIRCUIT

FIGURE 2. LOAD LINE REGULATION

FN8561 Rev 0.00

June 24, 2013

Page 1 of 2

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