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HIP6006
Data Sheet
April 1, 2005
FN4306.3
Buck and Synchronous-Rectifier
Pulse-Width Modulator (PWM) Controller
The HIP6006 provides complete control and protection for a
DC-DC converter optimized for high-performance
microprocessor applications. It is designed to drive two
N Channel MOSFETs in a synchronous-rectified buck
topology. The HIP6006 integrates all of the control, output
adjustment, monitoring and protection functions into a single
package.
The output voltage of the converter can be precisely
regulated to as low as 1.27V, with a maximum tolerance of
±1%
over temperature and line voltage variations.
The HIP6006 provides simple, single feedback loop, voltage-
mode control with fast transient response. It includes a
200kHz free-running triangle-wave oscillator that is
adjustable from below 50kHz to over 1MHz. The error
amplifier features a 15MHz gain-bandwidth product and
6V/µs slew rate which enables high converter bandwidth for
fast transient performance. The resulting PWM duty ratio
ranges from 0% to 100%.
The HIP6006 protects against over-current conditions by
inhibiting PWM operation. The HIP6006 monitors the current
by using the r
DS(ON)
of the upper MOSFET which eliminates
the need for a current sensing resistor.
Features
• Drives Two N-Channel MOSFETs
• Operates From +5V or +12V Input
• Simple Single-Loop Control Design
- Voltage-Mode PWM Control
• Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Ratio
• Excellent Output Voltage Regulation
- 1.27V Internal Reference
-
±1%
Over Line Voltage and Temperature
• Over-Current Fault Monitor
- Does Not Require Extra Current Sensing Element
- Uses MOSFETs r
DS(ON)
• Small Converter Size
- Constant Frequency Operation
- 200kHz Free-Running Oscillator Programmable from
50kHz to Over 1MHz
• 14 Pin, SOIC and TSSOP Package
• Pb-Free Available (RoHS Compliant)
Applications
• Power Supply for Pentium®, Pentium Pro, PowerPC™
and Alpha™ Microprocessors
• High-Power 5V to 3.xV DC-DC Regulators
• Low-Voltage Distributed Power Supplies
Pinout
HIP6006
(SOIC, TSSOP)
TOP VIEW
RT
OCSET
SS
COMP
FB
EN
GND
1
2
3
4
5
6
7
14 VCC
13 PVCC
12 LGATE
11 PGND
10 BOOT
9
8
UGATE
PHASE
Ordering Information
PART NUMBER
HIP6006CB
HIP6006CB-T
HIP6006CBZ (Note)
HIP6006CBZ-T
(Note)
HIP6006CV
HIP6006CV-T
TEMP.
RANGE (
o
C)
0 to 70
0 to 70
0 to 70
0 to 70
0 to 70
0 to 70
PACKAGE
14 Ld SOIC
14 Ld SOIC) (T&R)
PKG.
DWG. #
M14.15
M14.15
14 Ld SOIC (Pb-free) M14.15
14 Ld SOIC) (T&R)
(Pb-free)
14 Ld TSSOP
M14.15
M14.173
14 Ld TSSOP (T&R) M14.173
NOTE: Intersil Pb-free products employ special Pb-free material sets;
molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both
SnPb and Pb-free soldering operations. Intersil Pb-free products are
MSL classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J STD-020.
PowerPC™ is a trademark of IBM.
Alpha™ is a trademark of Digital Equipment Corporation.
Pentium® is a registered trademark of Intel Corporation.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2001, 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
HIP6006
Typical Application
12V
VCC
SS
OCSET
EN
BOOT
RT
OSC
+5V OR +12V
MONITOR AND
PROTECTION
UGATE
PHASE
PVCC
+12V
+V
O
HIP6006
REF
+
FB
+
-
LGATE
PGND
GND
-
COMP
Block Diagram
VCC
POWER-ON
RESET (POR)
10µA
OCSET
+
EN
-
OVER-
CURRENT
4V
SOFT-
START
SS
BOOT
UGATE
PHASE
200µA
REFERENCE
1.27 VREF
+
PWM
COMPARATOR
-
+
INHIBIT
PWM
-
GATE
CONTROL
LOGIC
FB
COMP
RT
ERROR
AMP
PVCC
LGATE
PGND
GND
OSCILLATOR
2
HIP6006
Absolute Maximum Ratings
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +15.0V
Boot Voltage, V
BOOT
- V
PHASE
. . . . . . . . . . . . . . . . . . . . . . +15.0V
Input, Output or I/O Voltage . . . . . . . . . . . . GND -0.3V to V
CC
+0.3V
ESD Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Class 2
Thermal Information
Thermal Resistance (Typical, Note 1)
θ
JA
(
o
C/W)
SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
85
TSSOP Package . . . . . . . . . . . . . . . . . . . . . . . . . . .
95
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . 150
o
C
Maximum Storage Temperature Range . . . . . . . . . . -65
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300
o
C
(Lead tips only)
Operating Conditions
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . +12V
±10%
Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . . 0
o
C to 70
o
C
Junction Temperature Range. . . . . . . . . . . . . . . . . . . . 0
o
C to 125
o
C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1.
θ
JA
is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications
PARAMETER
VCC SUPPLY CURRENT
Nominal Supply
Shutdown Supply
POWER-ON RESET
Rising V
CC
Threshold
Falling V
CC
Threshold
Enable - Input threshold Voltage
Rising V
OCSET
Threshold
OSCILLATOR
Free Running Frequency
Total Variation
Ramp Amplitude
REFERENCE
Reference Voltage
ERROR AMPLIFIER
DC Gain
Gain-Bandwidth Product
Slew Rate
GATE DRIVERS
Upper Gate Source
Upper Gate Sink
Lower Gate Source
Lower Gate Sink
PROTECTION
OCSET Current Source
Soft Start Current
Recommended Operating Conditions, Unless Otherwise Noted
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
I
CC
EN = V
CC
; UGATE and LGATE Open
EN = 0V
-
-
5
50
-
100
mA
µA
V
OCSET
= 4.5VDC
V
OCSET
= 4.5VDC
V
OCSET
= 4.5VDC
-
8.2
0.8
-
-
-
-
1.27
10.4
-
2.0
-
V
V
V
V
R
T
= OPEN, V
CC
= 12
6kΩ < R
T
to GND < 200kΩ
∆V
OSC
R
T
= OPEN
185
-15
-
200
-
1.9
215
+15
-
kHz
%
V
P-P
1.258
1.270
1.282
V
-
GBW
SR
COMP = 10pF
-
-
88
15
6
-
-
-
dB
MHz
V/µs
I
UGATE
R
UGATE
I
LGATE
R
LGATE
V
BOOT
- V
PHASE
= 12V, V
UGATE
= 6V
I
LGATE
= 0.3A
V
CC
= 12V, V
LGATE
= 6V
I
LGATE
= 0.3A
350
-
300
-
500
5.5
450
3.5
-
10
-
6.5
mA
Ω
mA
Ω
I
OCSET
I
SS
V
OCSET
= 4.5VDC
170
-
200
10
230
-
µA
µA
3
HIP6006
Typical Performance Curves
80
70
1000
RESISTANCE (kΩ)
R
T
PULLUP
TO +12V
I
VCC
(mA)
60
50
40
30
20
10
0
100
200
C
GATE
= 10pF
300 400 500 600 700 800
SWITCHING FREQUENCY (kHz)
900
1000
C
GATE
= 1000pF
C
GATE
= 3300pF
100
R
T
PULLDOWN
TO V
SS
10
10
100
SWITCHING FREQUENCY (kHz)
1000
FIGURE 1. R
T
RESISTANCE vs FREQUENCY
FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY
Functional Pin Description
RT
OCSET
SS
COMP
FB
EN
GND
1
2
3
4
5
6
7
14 VCC
13 PVCC
12 LGATE
11 PGND
10 BOOT
9
8
UGATE
PHASE
SS (Pin 3)
Connect a capacitor from this pin to ground. This capacitor,
along with an internal 10µA current source, sets the soft-start
interval of the converter.
COMP (Pin 4) and FB (Pin 5)
COMP and FB are the available external pins of the error
amplifier. The FB pin is the inverting input of the error
amplifier and the COMP pin is the error amplifier output.
These pins are used to compensate the voltage-control
feedback loop of the converter.
RT (Pin 1)
This pin provides oscillator switching frequency adjustment.
By placing a resistor (R
T
) from this pin to GND, the nominal
200kHz switching frequency is increased according to the
following equation:
5
•
10
-
Fs
≈
200kHz
+ --------------------
R
T
(
kΩ
)
6
EN (Pin 6)
This pin is the open-collector enable pin. Pull this pin below
1V to disable the converter. In shutdown, the soft start pin is
discharged and the UGATE and LGATE pins are held low.
GND (Pin 7)
(R
T
to GND)
Signal ground for the IC. All voltage levels are measured
with respect to this pin.
Conversely, connecting a pull-up resistor (R
T
) from this pin
to V
CC
reduces the switching frequency according to the
following equation.:
4
•
10
-
Fs
≈
200kHz
– --------------------
R
T
(
kΩ
)
7
PHASE (Pin 8)
Connect the PHASE pin to the upper MOSFET source. This
pin is used to monitor the voltage drop across the MOSFET
for over-current protection. This pin also provides the return
path for the upper gate drive.
(R
T
to 12V)
OCSET (Pin 2)
Connect a resistor (R
OCSET
) from this pin to the drain of the
upper MOSFET. R
OCSET
, an internal 200µA current source
(I
OCS
), and the upper MOSFET on-resistance (r
DS(ON)
) set
the converter over-current (OC) trip point according to the
following equation:
I
OCS
•
R
OCSET
-
I
PEAK
= -------------------------------------------
r
DS
(
ON
)
UGATE (Pin 9)
Connect UGATE to the upper MOSFET gate. This pin
provides the gate drive for the upper MOSFET.
BOOT (Pin 10)
This pin provides bias voltage to the upper MOSFET driver.
A bootstrap circuit may be used to create a BOOT voltage
suitable to drive a standard N-Channel MOSFET.
PGND (Pin 11)
This is the power ground connection. Tie the lower MOSFET
source to this pin.
An over-current trip cycles the soft-start function.
4
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