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PDF HIP6303 Data sheet ( Hoja de datos )
| Número de pieza | HIP6303 | |
| Descripción | Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Data Sheet
HIP6303
December 1999
File Number 4767
Microprocessor CORE Voltage Regulator
Multi-Phase Buck PWM Controller
The HIP6303 multi-phase PWM control IC together with its
companion gate drivers, the HIP6601, HIP6602 or HIP6603
and Intersil MOSFETs provides a precision voltage
regulation system for advanced microprocessors.
Multiphase power conversion is a marked departure from
earlier single channel converter configurations previously
employed to satisfy the ever increasing current demands of
modern microprocessors. Multi-phase converters, by
distributing the power and load current results in smaller and
lower cost transistors with fewer input and 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 channel converter operating at 350kHz will
have a ripple frequency of 1.05MHz. Moreover, greater
converter 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 1.30V to 2.05V 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
programmed voltage. Over-voltage, 15% above programmed
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.
Features
• AMD Athlon Compatible
• Multi-Phase Power Conversion
• Precision Channel Current Sharing
- Loss Less Current Sampling - Uses rDS(ON)
• Precision CORE Voltage Regulation
- ±1% System Accuracy Over Temperature
• Microprocessor Voltage Identification Input
- 4-Bit VID Input
- 1.30V to 2.05V in 50mV Steps
- Programmable “Droop” Voltage
• Fast Transient Recovery Time
• Over Current Protection
• Automatic Selection of 2, 3, or 4 Channel Operation
• High Ripple Frequency, (Channel Frequency) Times
Number of Channels . . . . . . . . . . . . . . . 100kHz to 6MHz
Ordering Information
PART NUMBER TEMP. (oC) PACKAGE PKG. NO.
HIP6303CB
0 to 70 20 Ld SOIC M20.3
HIP6303CB-T
20 Ld SOIC Tape and Reel
HIP6303EVAL1
Evaluation Platform
Pinout
HIP6303 (SOIC)
TOP VIEW
VID3 1
VID2 2
VID1 3
VID0 4
EN 5
COMP 6
FB 7
FS/DIS 8
GND 9
VSEN 10
20 VCC
19 PGOOD
18 PWM4
17 ISEN4
16 ISEN1
15 PWM1
14 PWM2
13 ISEN2
12 ISEN3
11 PWM3
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999
Athlon™ is a trademark of Advanced Micro Devices, Inc.
1 page  
HIP6303
Typical Application - 4 Channel Converter Using HIP6602 Gate Drivers
+5V
PGOOD
EN
VID3
VID2
VID1
VID0
FB
VSEN
COMP
VCC
ISEN1
PWM1
PWM2
ISEN2
MAIN
CONTROL
HIP6303
FS/DIS
ISEN3
PWM3
PWM4
GND ISEN4
+12V
VCC
BOOT1
VIN = +12V
UGATE1
PHASE1
LGATE1
DUAL
DRIVER
HIP6602
PVCC
BOOT2
+5V
VIN +12V
PWM1
PWM2
UGATE2
PHASE2
LGATE2
GND
+12V
VCC
BOOT3
V IN+12V
UGATE3
PHASE3
LGATE3
DUAL
DRIVER
HIP6602
PVCC
BOOT4
+5V
VIN +12V
PWM3
PWM4
UGATE4
PHASE4
LGATE4
GND
L01
L02
L03
L04
5
+VCORE
5 Page 
HIP6303
RIN
RFB Cc
FB COMP
HIP6303
ERROR
AMPLIFIER
-
+
SAWTOOTH
GENERATOR
CORRECTION
+
-
COMPARATOR
- PWM
+ CIRCUIT
REFERENCE
DAC
DIFFERENCE
+
TO OTHER
CHANNELS
-
CURRENT
SENSING
CURRENT
SENSING
FROM
OTHER
CHANNELS
AVERAGING
PWM
ISEN
TO OVER
CURRENT
TRIP
+
-
COMPARATOR
REFERENCE
VIN
Q1 L01
HIP6601
Q2
IL
PHASE
RISEN
ONLY ONE OUTPUT
STAGE SHOWN
INDUCTOR
CURRENT(S)
FROM
OTHER
CHANNELS
VCORE
FIGURE 7. SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM SHOWING CURRENT AND VOLTAGE SAMPLING
Current Sensing and Balancing
Overview
The HIP6303 samples the on-state voltage drop across each
synchronous rectifier FET, Q2, as an indication of the
inductor current in that channel, see Figure 7. Neglecting AC
effects (to be discussed later), the voltage drop across Q2 is
simply rDS(ON)(Q2) x inductor current (IL). Note that IL, the
inductor current, is either 1/2, 1/3, or 1/4 of the total current
(ILT), depending on how many channels are active.
The voltage at Q2’s drain, the PHASE node, is applied to the
RISEN resistor to develop the IISEN current to the HIP6303
ISEN pin. This pin is held at virtual ground, so the current
through RISEN is IL x rDS(ON)(Q2) / RISEN.
The IISEN current provides information to perform the
following functions:
1. Detection of an over-current condition
2. Reduce the regulator output voltage with increasing load
current (droop)
3. Balance the IL currents in multiple channels
Over-Current, Selecting RISEN
The current detected through the RISEN resistor is averaged
with the current(s) detected in the other 1, 2, or 3 channels.
The averaged current is compared with a trimmed, internally
generated current, and used to detect an over-current
condition.
The nominal current through the RISEN resistor should be
50µA at full output load current, and the nominal trip point for
over-current detection is 165% of that value, or 82.5µA.
Therefore, RISEN = IL x rDS(ON) (Q2) / 50µA.
For a full load of 25A per channel, and an rDS(ON) (Q2) of
4mΩ, RISEN = 2kΩ.
The over-current trip point would be 165% of 25A, or ~ 41A
per channel. The RISEN value can be adjusted to change the
over-current trip point, but it is suggested to stay within ±25%
of nominal.
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet HIP6303.PDF ] | |
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