Intersil Corporation HIP6301 Datasheet

HIP6301

Data Sheet March 2000

Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller

The HIP6301 multi-phase PWM control IC together with its companion gate drivers, the HIP6601, HIP6602 or HIP6603 and internal MOSFETs provides a precision voltage regulation system for advanced microprocessors. Multiphase power conversion is a marked departure from earlier single phase converter conﬁgurations previously employed to satisfy the ever increasing current demands of modern microprocessors. Multi-phase convertors, by distributing the power and load current results in smaller and lower cost transistors with fewerinputand output capacitors. These reductions accrue from the higher effective conversion frequency with higher frequency ripple current due to the phase interleaving process of this topology. For example, a three phase convertor operating at 350kHz will have a ripple frequency of 1.05MHz. Moreover, greater convertor bandwidth of this design results in faster response to load transients.

Outstanding features of this controller IC include programmable VID codes from the microprocessor that range from 1.100V to 1.850V with a system accuracy of ±1%. Pull up currents on these VID pins eliminates the need for external pull up resistors. In addition “droop” compensation, used to reduce the overshoot or undershoot of the CORE voltage, is easily programmed with a single resistor.

Another feature of this controller IC is the PGOOD monitor circuit which is held low until the CORE voltage increases, during its Soft-Start sequence, to within 10% of the programmedvoltage.Over-voltage,15%aboveprogrammed CORE voltage, results in the converter shutting down and turning the lower MOSFETs ON to clamp and protect the microprocessor. Under voltage is also detected and results in PGOOD low if the CORE voltage falls 10% below the programmed level. Over-current protection reduces the regulator current to less than 25% of the programmed trip value. These features provide monitoring and protection for the microprocessor and power system.

File Number 4765.1

Features

• Multi-Phase Power Conversion

• Precision Channel Current Sharing

- Loss Less Current Sampling - Uses r

DS(ON)

• Precision CORE Voltage Regulation

- ±1% System Accuracy Over Temperature

• Microprocessor Voltage Identiﬁcation Input

- 5-Bit VID Input

- 1.100V to 1.850V in 25mV Steps

- Programmable “Droop” Voltage

• Fast Transient Recovery Time

• Over Current Protection

• Automatic Selection of 2, 3, or 4 Phase Operation

• High Ripple Frequency, (Channel Frequency) Times

Number Channels . . . . . . . . . . . . . . . . . 100kHz to 6MHz

Ordering Information

PART NUMBER TEMP. (oC) PACKAGE PKG. NO.

HIP6301CB 0 to 70 20 Ld SOIC M20.3 HIP6301CB-T 20 Ld SOIC Tape and Reel HIP6301EVAL1 Evaluation Platform

Pinout

HIP6301 (SOIC)

TOP VIEW

VID4 VID3 VID2 VID1 VID0

COMP

FS/DIS

GND

VSEN

1 2 3 4 5 6 7 8 9

20 19 18 17 16 15 14 13 12 11

PGOOD PWM4 ISEN4 ISEN1 PWM1 PWM2 ISEN2 ISEN3 PWM3

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 321-724-7143

Block Diagram

VSEN

X 0.9

X1.15

OVP

PGOOD

LATCH

HIP6301

∑

POWER-ON

RESET (POR)

CLOCK AND

SAWTOOTH

GENERATOR

THREE

STATE

FS/EN

PWM

PWM1

COMP

VID0

VID1

VID2

VID3

VID4

D/A

SOFT-

START

AND FAULT

LOGIC

I_TOT

E/A

∑

I_TRIP

CORRECTION

∑

CURRENT

PWM

PWM2

∑

PWM

PHASE

NUMBER

CHANNEL

DETECTOR

PWM3

PWM4

ISEN1

ISEN2

ISEN3

ISEN4

GND

Simpliﬁed Power System Diagram

VSEN

PWM 1

HIP6301HIP6301

SYNCHRONOUS

RECTIFIED BUCK

CHANNEL

PWM 2

SYNCHRONOUS

RECTIFIED BUCK

HIP6301

PWM 3

PWM 4

VID

SYNCHRONOUS

RECTIFIED BUCK

SYNCHRONOUS

RECTIFIED BUCK

Functional Pin Description

VID4

VID3

VID2

VID1

VID0

COMP

FS/DIS

GND

VSEN

VID4 (Pin 1), VID3(Pin 2), VID2 (Pin 3), VID1(Pin 4) and VID0 (Pin 5)

V oltage Identification inputs from microprocessor. These pins respond to TTL and 3.3V logic signals. The HIP6301 decodes VID bits to establish the output voltage. See Table 1.

COMP (Pin 6)

Output of the internal error ampliﬁer. Connect this pin to the external feedback and compensation network.

FB (Pin 7)

Inverting input of the internal error ampliﬁer.

FS/DIS (Pin 8)

Channel frequency,FSW, select and disable. A resistor from this pin to ground sets the switching frequency of the

20 19 18 17 16 15 14 13 12 11

PGOOD PWM4 ISEN4 ISEN1 PWM1 PWM2 ISEN2 ISEN3 PWM3

CHANNEL

MICROPROCESSOR

CHANNEL

converter. Pulling this pin to ground disables the converter and three states the PWM outputs. See Figure 10.

GND (Pin 9)

Bias and reference ground. All signals are referenced to this pin.

VSEN (Pin 10)

Power good monitor input. Connect to the microprocessorCORE voltage.

PWM1 (Pin 15), PWM2 (Pin 14), PWM3 (Pin 11) and PWM4 (Pin 18)

PWM outputs for each driven channel in use. Connect these pins to the PWM input of a HIP6601/2/3 driver. For systems which use 3 channels, connect PWM4 high. Two channel systems connect PWM3 and PWM4 high.

ISEN1 (Pin 16), ISEN2 (Pin 13), ISEN3 (Pin 12) and ISEN4 (Pin 17)

Current sense inputs from the individual converter channel’s phase nodes. Unused sense lines MUST be left open.

PGOOD (Pin 19)

Power good. This pin provides a logic-high signal when the microprocessor CORE voltage (VSEN pin) is within speciﬁed limits and Soft-Start has timed out.

VCC (Pin 20)

Bias supply. Connect this pin to a 5V supply.

HIP6301

Typical Application - 2 Phase Converter Using HIP6601 Gate Drivers

+12V

+5V

VCC

BOOT

PVCC

UGATE

PHASE

= +5V

PGOOD

VID4

VID3

VID2 VID1

VID0

VSEN

CONTROL

HIP6301

FS/DIS

GND

MAIN

COMP

PWM4 PWM3

PWM2

PWM1

ISEN4 ISEN3 ISEN2 ISEN1

VCC

PVCC

DRIVER HIP6601

BOOT

LGATE GND

UGATE PHASE

LGATE GND

= +5V

CORE

PWM

+12V

NC NC

PWM

HIP6301

Typical Application - 4 Phase Converter Using HIP6602 Gate Drivers

PGOOD

VID4

VID3

VID2 VID1

VID0

VSEN

CONTROL

HIP6301

FS/DIS

MAIN

GND

COMP

ISEN1

PWM1

PWM2

ISEN2

ISEN3

PWM3 PWM4

ISEN4

BOOT1

UGATE1

PHASE1

LGATE1

PVCC

+5V

+12V

DUAL DRIVER HIP6602

BOOT2

PWM1

PWM2

+12V

UGATE2

PHASE2

LGATE2

GND

BOOT3

UGATE3

PHASE3

VIN = +12V

+5V

VIN+12V

+12V

CORE

LGATE3

DUAL

DRIVER

HIP6602

PWM3

PWM4

GND

PVCC

BOOT4

UGATE4

PHASE4

LGATE4

+5V

+12V

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