FAN5090MTC Fairchild Semiconductor, FAN5090MTC Datasheet
FAN5090MTC
Specifications of FAN5090MTC
Available stocks
Related parts for FAN5090MTC
FAN5090MTC Summary of contents
Page 1
... VID4 PWRGD VID1 VID3 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 FAN5090 is a synchronous two-phase DC-DC controller IC which provides a highly accurate, programmable output voltage for VRM 9.x processors. Two interleaved synchro- nous buck regulator phases with built-in current sharing operate 180° ...
Page 2
FAN5090 Pin Assignments VID0 VID1 VID2 VID3 VID4 BYPASS AGND LDRVB PGNDB SWB HDRVB BOOTB Pin Definitions Pin Number Pin Name Pin Function Description 1-5 VID0-4 Voltage Identification Code Inputs. Internally pulled-up open collector/TTL compatible inputs program the output voltage ...
Page 3
PRODUCT SPECIFICATION Pin Number Pin Name Pin Function Description 20 ILIM Current Limit. A resistor from this pin to ground sets the over current trip level. 21 DROOP Droop Control. A resistor from this pin to ground sets the amount ...
Page 4
FAN5090 Electrical Specifications (V = 12V, VID = [01111] = 1.475V, and T CC The denotes specifications which apply over the full operating temperature range. Parameter Input Supply UVLO Hysteresis 12V UVLO 12V Supply Current Internal Voltage Regulator BYPASS Voltage ...
Page 5
PRODUCT SPECIFICATION Electrical Specifications (V = 12V, VID = [01111] = 1.475V, and T CC The denotes specifications which apply over the full operating temperature range. Parameter OVP and OTP Output Overvoltage Detect Over Temperature Shutdown Over Temperature Hysteresis Notes: ...
Page 6
FAN5090 Gate Drive Test Circuit V 3000pF 90% 90% 2V 10% OUT t DT 1.2V Figure 1. Output Drive Timing Diagram PRODUCT SPECIFICATION t F HDRV 2.2V 10 LDRV REV. 1.0.1 9/16/03 ...
Page 7
PRODUCT SPECIFICATION Typical Operating Characteristics (V = 12V 1.475V, and T CC OUT A EFFICIENCY VS. OUTPUT CURRENT 90 E* Mode 2 Phase Mode LOAD CURRENT ...
Page 8
FAN5090 Typical Operating Characteristics DYNAMIC VID CHANGE (1.475–1.575V) CH1: V (1.20V Offset) OUT CH2: VID2 40A Load CURRENT SHARING, 50A LOAD CH1 CH2 CURRENT LIMIT CH1: Iin CH2: Vout 8 (Continued) OUTPUT RIPPLE, 60A LOAD CURRENT ...
Page 9
PRODUCT SPECIFICATION Typical Operating Characteristics START-UP, 40A LOAD CH1: Vout CH2: Vin LOAD TRANSIENT, 0-40A CH1: Iout (26mV/A) CH2: Vout CLOSED LOOP RESPONSE 40 Phase Margin Gain 0 -10 -20 0 FREQUENCY (HZ) REV. 1.0.1 ...
Page 10
FAN5090 Application Circuit +12V +5V R10 FAN5090 R11 18 VCC C6 19 PWRGD 5 VID4 VID4 4 VID3 VID3 3 VID2 VID2 2 VID1 VID1 1 VID0 VID0 ENABLE/SS 21 DROOP/ R13 6 R14 ...
Page 11
PRODUCT SPECIFICATION Application Information Operation The FAN5090 Controller The FAN5090 is a programmable synchronous two-phase DC-DC controller IC. When designed with the appropriate external components, the FAN5090 can be configured to deliver more than 50A of output current, for VRM ...
Page 12
FAN5090 pin for return. Typically, the BOOT pin will use a charge pump as shown in Figure 2. Note that the BOOT and VCC pins are separated from the chip’s internal power and ground, BYPASS and AGND, for switching noise ...
Page 13
PRODUCT SPECIFICATION simultaneously (within less than nsec) to avoid false codes generating undesired output voltages. The Power Good flag tracks the VID codes, but has a 500µsec delay transitioning from high to low; long enough to ensure that there will ...
Page 14
FAN5090 Component Selection MOSFET Selection This application requires N-channel Enhancement Mode Field Effect Transistors. Desired characteristics are as follows: • Low Drain-Source On-Resistance, • R < 10m (lower is better); DS,ON • Power package with low Thermal Resistance; • Drain-Source ...
Page 15
PRODUCT SPECIFICATION It is necessary to have some low ESR capacitors at the input to the converter. These capacitors deliver current when the high side MOSFET switches on. Because of the interleaving, the number of such capacitors required is greatly ...
Page 16
FAN5090 Mechanical Dimensions – 24 Lead TSSOP Inches Millimeters Symbol Min. Max. Min. A — .047 — A1 .002 .006 0.05 B .007 0.19 .012 C .004 .008 0.09 D .303 .316 7.70 E .169 .177 4.30 e .026 BSC ...
Page 17
... Ordering Information Product Number Description FAN5090MTC VRM 9.x DC-DC Controller FAN5090MTCX VRM 9.x DC-DC Controller 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; ...