HIP6304 Intersil Corporation, HIP6304 Datasheet - Page 4

• Manufacturer Part Number: HIP6304
• Description: Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller
• Manufacturer: Intersil Corporation

Functional Pin Description
VID3 (Pin 1), VID2 (Pin 2), VID1 (Pin 3) and VID0
(Pin 4)
Voltage Identification inputs from microprocessor. These pins
respond to TTL and 3.3V logic signals. The HIP6304 decodes
VID bits to establish the output voltage. See Table 1.
EN (Pin 5)
Enable pin normal operation is with input open or high. A low
input disables the regulator and three states the PWM outputs.
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.
FIGURE 1. SIMPLIFIED BLOCK DIAGRAM OF THE HIP6304 VOLTAGE AND CURRENT CONTROL LOOPS FOR A TWO POWER
FB
AMPLIFIER
PROGRAMMABLE
REFERENCE
DAC
ERROR
-
+
CHANNEL REGULATOR
FS/DIS
COMP
R
VID3
VID2
VID1
VID0
IN
EN
FB
1
2
3
4
5
6
7
8
CORRECTION
CORRECTION
+
+
-
-
4
-
-
I AVERAGE
16
15
14
13
12
11
10
+
+
9
V
PGOOD
ISEN1
PWM1
PWM2
ISEN2
VSEN
GND
CC
+
-
+
-
COMPARATOR
AVERAGING
COMPARATOR
CURRENT
HIP6304
HIP6304
CURRENT
CURRENT
SENSING
SENSING
CIRCUIT
CIRCUIT
PWM
PWM
FS/DIS (Pin 8)
Channel frequency, F
this pin to ground sets the switching frequency of the
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 microprocessor-
CORE voltage.
ISEN2 (Pin 11) and ISEN1 (Pin 14)
Current sense inputs from the individual converter channel’s
phase nodes.
PWM2 (Pin 12) and PWM1 (Pin 13)
PWM outputs for each driven channel in use. Connect these
pins to the PWM input of a HIP6601/2/3 driver.
PGOOD (Pin 15)
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.
V
Bias supply. Connect this pin to a 5V supply.
CC
PWM1
PWM2
I
I
SEN1
SEN2
(Pin 16)
HIP6601
HIP6601
R
R
ISEN2
ISEN1
SW
Q2
Q4
V
, select and disable. A resistor from
V
IN
IN
Q1
Q3
PHASE
PHASE
L
I
01
L1
L
I
02
L2
V
C
CORE
OUT
R
LOAD