FAN5094MTCX Fairchild Semiconductor, FAN5094MTCX Datasheet

IC CTRLR DC/DC SYNC BUCK 28TSSOP

FAN5094MTCX

Manufacturer Part Number
FAN5094MTCX
Description
IC CTRLR DC/DC SYNC BUCK 28TSSOP
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of FAN5094MTCX

Applications
Controller, Intel Pentium® IV
Voltage - Input
12V
Number Of Outputs
1
Voltage - Output
1.1 ~ 1.85 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
28-TSSOP
Output Voltage
1.85 V
Output Current
60 A
Mounting Style
SMD/SMT
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
FAN5094MTCXTR
FAN5094MTCX_NL
FAN5094MTCX_NLTR
FAN5094MTCX_NLTR
Features
• Programmable output from 1.100V to 1.850V in 25mV
• Two interleaved synchronous phases per IC for maximum
• Up to 4 phase power system
• Built-in current sharing between phases and between ICs
• Frequency and phase synchronization between ICs
• Remote sense and Programmable Active Droop™
• High precision voltage reference
• High speed transient response
• Programmable frequency from 200KHz to 2MHz
• Adaptive delay gate switching
• Integrated high-current gate drivers
• Integrated Power Good, OV, UV, Enable/Soft Start
• Drives N-channel MOSFETs
• Operation optimized for 12V operation
• High efficiency mode at light load
• Overcurrent protection using MOSFET sensing
• 28 pin TSSOP package
Applications
• Power supply for Pentium
• Power supply for Athlon
• Power supply for Ultrasparc™
• VRM for Pentium IV processor
• Programmable step-down power supply
Block Diagram
Pentium is a registered trademark of Intel Corporation. Athlon is a registered trademark of AMD. Programmable Active Droop is a trademark of Fairchild Semiconductor.
FAN5094
Multi-Phase Interleaved Buck Converter
steps using an integrated 5-bit DAC
performance
functions
®
®
IV
+
VFB
PHASE
CLK
CLK
PHASE
VFB
FAN5094
FAN5094
ISHR
ISHR
+12V
+12V
+12V
+12V
Description
The FAN5094 is a synchronous multi-phase DC-DC
controller IC which provides a highly accurate,
programmable output voltage for all high-performance
processors. Two interleaved synchronous buck regulator
phases with built-in current sharing operate 180 out of
phase to provide the fast transient response needed to satisfy
high current applications while minimizing external
components. FAN5094s can be paralleled while maintaining
both frequency and phase synchronization and ensuring
current sharing in a high-power system. The FAN5094
features remote voltage sensing, Programmable Active
Droop
transient response with minimum output capacitance. It has
integrated high-current gate drivers with adaptive delay gate
switching, eliminating the need for external drive devices.
These make it possible to create power supplies running at a
switching frequency as high as 4MHz, for ultra-high density.
The FAN5094 uses a 5-bit D/A converter to program the
output voltage from 1.100V to 1.850V in 25mV steps with
an accuracy of 0.5%. The FAN5094 uses a high level of
integration to deliver load currents in excess of 150A from a
12V source with minimal external circuitry. The FAN5094
also offers integrated functions including Power Good,
Output Enable/Soft Start, under-voltage lockout, over-
voltage protection, and current limiting with independent
current sense on each phase. It is available in a 28-pin
TSSOP package.
+
and advanced response for optimal converter
VFB
Processor
www.fairchildsemi.com
REV. 1.0.2 5/13/02

Related parts for FAN5094MTCX

FAN5094MTCX Summary of contents

Page 1

... PHASE CLK CLK PHASE VFB Pentium is a registered trademark of Intel Corporation. Athlon is a registered trademark of AMD. Programmable Active Droop is a trademark of Fairchild Semiconductor. Description The FAN5094 is a synchronous multi-phase DC-DC controller IC which provides a highly accurate, programmable output voltage for all high-performance processors ...

Page 2

FAN5094 Pin Assignments VID0 VID1 VID2 VID3 VID4 BYPASS AGND LDRVB GNDB ISNSB SWB HDRVB BOOTB Pin Definitions Pin Number Pin Name 1-5 VID0-4 6 CLK 7 BYPASS 8 AGND 9 LDRVB 10 GNDB 11 ISNSB 12 SWB 13 HDRVB ...

Page 3

PRODUCT SPECIFICATION Pin Definitions (continued) Pin Number Pin Name 19 GNDA 20 LDRVA 21 VCC 22 PWRGD 23 PHASE 24 ISHR 25 DROOP/E* 26 ENABLE/ VFB Absolute Maximum Ratings Parameter Supply Voltage VCC Supply Voltages BOOTA, BOOTB ...

Page 4

FAN5094 Recommended Operating Conditions Parameter Output Driver Supply, Boot VCC Input Logic HIGH Input Logic LOW Ambient Operating Temperature Electrical Specifications (V = 12V 1.500V, and T CC OUT A The denotes specifications which apply over the full ...

Page 5

PRODUCT SPECIFICATION Electrical Specifications (V = 12V 1.500V, and T CC OUT A The denotes specifications which apply over the full operating temperature range. Parameter PWRGD Threshold PWRGD Hysteresis PWRGD Output Voltage PWRGD Delay 12V UVLO UVLO Hysteresis ...

Page 6

FAN5094 Table 1. Output Voltage Programming Codes VID4 VID3 ...

Page 7

PRODUCT SPECIFICATION Internal Block Diagram 27 Master f/2 2 Clock f/2 23 PHASE - 6 CLK + 5-Bit Power DAC Good VID2 VID4 VID0 PWRGD VID1 VID3 REV. 1.0.2 5/13/02 +12V BYPASS 7 ...

Page 8

FAN5094 Typical Operating Characteristics (V = 12V, and T = +25°C using circuit in Figure 1 , unless otherwise noted TRANSIENT RESPONSE, 50A to 0.5A ...

Page 9

PRODUCT SPECIFICATION Typical Operating Characteristics OUTPUT RIPPLE VOLTAGE TIME (1 s/DIVISION) GATE DRIVE FALL TIME TIME (10ns/DIVISION) CURRENT SHARING BETWEEN INDUCTORS TIME (500ns/DIVISION) REV. 1.0.2 5/13/02 (Continued) GATE DRIVE RISE TIME TIME (50ns/DIVISION) ADAPTIVE GATE DELAY TIME (50ns/DIVISION) POWER GOOD ...

Page 10

FAN5094 Typical Operating Characteristics Droop vs. R Droop , RT = 43K 180 160 140 120 100 Droop 10 (Continued) 1.501 1.500 1.499 1.498 1.497 ...

Page 11

PRODUCT SPECIFICATION Application Circuit L1 (Optional) +12V +12V C IN VID4 VID3 VID2 VID1 VID0 ENABLE/SS C1 PWRGD R1 + ...

Page 12

FAN5094 Table 2. FAN5094 Application Bill of Materials for Figure 1 Manufacturer Reference Part # C1, C3-5, C7 Panasonic ECU-V1H104ZFX C2, C6 Any C Rubycon IN 16MBZ1500M C Rubycon OUT 6.3MBZ2200M D1-3 Fairchild MBR0520 L1 Coiltronics DR127-1R5 L2-4 Coiltronics DR127-R47 ...

Page 13

PRODUCT SPECIFICATION L1 (Optional) +12V +12V C IN VID4 VID3 VID2 VID1 VID0 ENABLE/SS C1 PWRGD R1 + ...

Page 14

FAN5094 Table 3. FAN5094 Application Bill of Materials for Figure 2 Reference Manufacturer Part # C1, C3-5, C7 Panasonic ECU-V1H104ZFX C2, C6 Any C Rubycon IN 16MBZ1500M C Rubycon OUT 6.3MBZ2200M D1-3 Fairchild MBR0520 L1 Coiltronics DR127-1R5 L2-5 Coiltronics DR127-R47 ...

Page 15

PRODUCT SPECIFICATION Application Information Operation The FAN5094 Controller The FAN5094 is a programmable synchronous multi-phase DC-DC controller IC. When designed around the appropriate external components, the FAN5094 can be configured to deliver more than 100A of output current, as appropriate ...

Page 16

FAN5094 tively, of the appropriate low-side MOSFET. Care is required in the layout of these grounds; see the layout guidelines in this datasheet. Current Sharing The two independent current sensors of the FAN5094 operate with their independent current control loops ...

Page 17

PRODUCT SPECIFICATION Output Enable/Soft Start (ENABLE/SS) The FAN5094 will accept an open collector/TTL signal for controlling the output voltage. The low state disables the output voltage. When disabled, the PWRGD output is in the low state. Even if an enable ...

Page 18

FAN5094 For the high-side MOSFET, the gate charge is as important as the on-resistance, especially with a 12V input and with higher switching frequencies. This is because the speed of the transition greatly affects the power dissipation. It may be ...

Page 19

PRODUCT SPECIFICATION voltage of the MOSFET’s body diode. Power capability is not a criterion for this device, as its dissipation is very small. Output Filter Capacitors The output bulk capacitors of a converter help determine its output ripple voltage and ...

Page 20

FAN5094 PCB Layout Guidelines • Placement of the MOSFETs relative to the FAN5094 is critical. Place the MOSFETs such that the trace length of the HIDRV and LODRV pins of the FAN5094 to the FET gates is minimized. A long ...

Page 21

PRODUCT SPECIFICATION Mechanical Dimension 28 Lead TSSOP Inches Millimeters Symbol Min. Max. Min. A — .047 — A1 .002 .006 0.05 B .007 .012 0.19 C .008 .013 0.09 D .378 .386 9.60 E .172 .180 4.30 e .026 BSC ...

Page 22

... Ordering Information Product Number Package FAN5094MTC 28 pin TSSOP FAN5094MTCX Tape & Reel DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; ...

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