DATASHEET
HIP6004B
FN4567
Rev 3.00
November 9, 2004
Buck and Synchronous-Rectifier (PWM) Controller and Output Voltage Monitor
The HIP6004B provides complete control and protection for
a DC-DC converter optimized for high-performance
Features
• Drives Two N-Channel MOSFETs
• Operates from +5V or +12V Input
microprocessor applications. It is designed to drive two
N-Channel MOSFETs in a synchronous-rectified buck
topology. The HIP6004B integrates all of the control, output
adjustment, monitoring and protection functions into a single
package.
• Simple Single-Loop Control Design
- Voltage-Mode PWM Control
• Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Ratio
The output voltage of the converter is easily adjusted and
precisely regulated. The HIP6004B includes a fully
TTL-compatible 5-input digital-to-analog converter (DAC)
that adjusts the output voltage from 1.3V
to 2.05V
in
DC
• Excellent Output Voltage Regulation
DC
in 0.1V increments steps.
0.05V and from 2.1V
to 3.5V
- 1% Over Line Voltage and Temperature
DC
DC
The precision reference and voltage-mode regulator hold the
selected output voltage to within 1% over temperature and
line voltage variations.
• TTL-Compatible 5-Bit Digital-to-Analog Output
Voltage Selection
- Wide Range . . . . . . . . . . . . . . . . . . . 1.3V
- 0.1V Binary Steps . . . . . . . . . . . . . . 2.1V
to 3.5V
to 3.5V
DC
DC
DC
DC
DC
The HIP6004B 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/s slew rate which enables high converter bandwidth for
fast transient performance. The resulting PWM duty ratio
ranges from 0% to 100%.
- 0.05V Binary Steps . . . . . . . . . . . . 1.3V
to 2.05V
DC
• Power-Good Output Voltage Monitor
• Over-Voltage and Over-Current Fault Monitors
- Does Not Require Extra Current Sensing Element,
Uses MOSFET’s r
DS(ON)
• Small Converter Size
The HIP6004B monitors the output voltage with a window
comparator that tracks the DAC output and issues a Power
Good signal when the output is within 10%. The HIP6004B
protects against over-current and overvoltage conditions by
inhibiting PWM operation. Additional built-in overvoltage
protection triggers an external SCR to crowbar the input
supply. The HIP6004B monitors the current by using the
- Constant Frequency Operation
- 200kHz Free-Running Oscillator Programmable from
50kHz to over 1MHz
• QFN Package:
- Compliant to JEDEC PUB95 MO-220
QFN - Quad Flat No Leads - Package Outline
- Near Chip Scale Package footprint, which improves
PCB efficiency and has a thinner profile
r
of the upper MOSFET which eliminates the need for
DS(ON)
a current sensing resistor.
• Pb-Free Available (RoHS Compliant)
Applications
• Power Supply for Pentium®, Pentium Pro, Pentium II,
PowerPC™, K6™, 6X86™ and Alpha™ Microprocessors
•
•
High-Power 5V to 3.xV DC-DC Regulators
Low-Voltage Distributed Power Supplies
FN4567 Rev 3.00
November 9, 2004
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