 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| PROGRAMMABLE DC/DC CONTROLLER March 11, 1998 SC1150 TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com DESCRIPTION The SC1150 voltage mode controller contains most of the circuitry necessary to implement a DC/DC converter (R) for powering the Intel Pentium Pro microprocessor, both in single and multiple processor configurations. The SC1150 features an integrated D/A converter, pulse by pulse current limiting, integrated power good signaling, logic compatible shutdown and on-board over voltage protection (OVP). The SC1150 operates at a fixed frequency of 200kHz, providing an optimum compromise between size, efficiency and cost in the intended application areas. The integrated D/A converter provides programmability of output voltage from 2.0V to 3.5V in 100mV increments with no external components. Both the range and the increment value may be changed by adding external components. The SC1150 provides an OVP output which can be used to trigger a crowbar circuit for true over voltage protection. FEATURES * * * * 85% efficiency 4 bit DAC for output programmability On chip power good and OVP functions (R) Meets Intel Pentium Pro VRM8.0 specifications APPLICATIONS * * * * Pentium Pro Processor supplies (R) Pentium Pro Processor VRM modules 2.0V to 3.5V microprocessor supplies Programmable power supplies (R) ORDERING INFORMATION DEVICE (1) PACKAGE SO-16 TEMP RANGE (TJ) 0 - 125C SC1150CS Note: (1) Add suffix `TR' for tape and reel. BLOCK DIAGRAM VCC CSm CSp SHUTDOWN 1.25V REF VCC 70mV CURRENT LIMIT BST + ABSOLUTE MAXIMUM RATINGS Parameter VCC to GND PGND to GND BST to GND + + Symbol VIN Maximum -0.3 to 7 1 -0.3 to 15 Units V V V C C C VID3 VID2 VID1 VID0 D/A 1.00V to 1.75V OSCILLATOR S R Q LEVEL SHIFT AND DRIVE DH PGND VOSENSE + PWRGOOD + VCC + - ERROR AMP Operating Temperature Range B16997B Storage Temperature Range Lead Temperature (Soldering) 10 sec TA TSTG TLEAD 0 to 70 -65 to +150 300 OVP GND FB PIN CONFIGURATION GND VCC OVP PWRGOOD CSm CSp PGND DH 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VID0 VID1 VID2 VID3 FB VOSENSE SHUTDOWN BST Pentium is a registered trademark of Intel Corporation 1 (c) 1998 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA PROGRAMMABLE DC/DC CONTROLLER March 11, 1998 SC1150 ELECTRICAL CHARACTERISTICS Unless specified: VCC = 4.75V to 5.25V; GND = PGND = 0V; VOSENSE = VO; 0mV < (CSp-CSm) < 60mV; TA = 25 C PARAMETER Output Voltage (2) o CONDITIONS IO = 2A in Application circuit 16935E Load Regulation Line Regulation UV Lockout Current Limit Voltage Oscillator Frequency Oscillator Max Duty Cycle DH Sink/Source Current Output Voltage Tempco IO = 0.3A to 13A (1) VID 3210 1111 1110 1101 1100 1011 1010 1001 1000 0111 0110 0101 0100 0011 0010 0001 0000 xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx MIN 1.980 2.079 2.178 2.277 2.376 2.475 2.574 2.673 2.772 2.871 2.970 3.069 3.168 3.267 3.366 3.465 TYP 2.000 2.100 2.200 2.300 2.400 2.500 2.600 2.700 2.800 2.900 3.000 3.100 3.200 3.300 3.400 3.500 1 0.5 70 200 95 MAX UNITS 2.020 2.121 2.222 2.323 2.424 2.525 2.626 2.727 2.828 2.929 3.030 3.131 3.232 3.333 3.434 3.535 V 60 180 90 1 4.2 80 220 % % V mV kHz % A o ppm/ C BST - DH = 4.5V, DH - PGND = 2V 65 NOTES: (1) Low output currents, below the continuous conduction threshold will cause an increase in output voltage beyond the load regulation limit. For Application circuit 16935E see the regulation curve on sheet 5. (2) All VID codes not specifically listed here are invalid and cause shutdown exactly as if the shutdown pin had been asserted. xxxx refers to any valid VID code. 2 (c) 1998 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA PROGRAMMABLE DC/DC CONTROLLER March 11, 1998 SC1150 PIN DESCRIPTION Pin # Pin Name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 GND VCC OVP (1) (1) Pin Function Small Signal Analog and Digital Ground Chip Supply Voltage High Signal out if VO>setpoint + 20% Open collector logic output, high if VO within 10% of setpoint Current Sense Input (negative) Current Sense Input (positive) Power Ground High side Driver Output Vcc for high side Driver (1) PWRGOOD CSm CSp PGND DH BST GND VCC OVP PWRGOOD CSm CSp PGND DH 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VID0 VID1 VID2 VID3 FB VOSENSE SHUTDOWN BST SHUTDOWN VOSENSE FB VID3 VID2 VID1 VID0 (1) (1) (1) (1) Logic low shuts down the converter Top end of internal feedback chain Voltage Feedback Input Programming Input (MSB) Programming Input Programming Input Programming Input (LSB) NOTE: (1) All logic level inputs and outputs are open collector TTL compatible 3 (c) 1998 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA PROGRAMMABLE DC/DC CONTROLLER March 11, 1998 SC1150 APPLICATION CIRCUIT Q1 L1 4uH R1 5mOhm C6 1000uF C8 1000uF C10 1000uF 5V IN BUK556 VCCP + C1 0.1uF + C2 1000uF C4 1000uF C3 1000uF + R2 10k R5 10 D1 PSR16C30CT + + + + + + C5 1000uF C7 1000uF C9 1000uF C12 0.1uF 12V IN R3 2.32k C11 0.1uF CSp CSm VOSENSE PWRGOOD FB BST DH PGND 6 5 11 4 12 9 8 7 R4 1.00k U1 2 VCC OVP VID0 VID1 VID2 VID3 SHUTDOWN GND SC1150CS OVP VID0 VID1 VID2 VID3 SHUTDOWN 3 16 15 14 13 10 1 PWRGD C13 0.1uF REF 16935E MATERIALS LIST Quantity Reference 4 9 1 1 1 1 1 1 1 1 1 Part/Description Vendor Various SANYO PHOTRON 8 Turns 16AWG on MICROMETALS T50-52D core PHILIPS IRC Various Logic level FET, 22m, 30V OAR-1 Series MV-GX or equiv. Low ESR Notes C1,C11-C13 0.1F Ceramic C2-C10 D1 L1 Q1 R1 R2 R3 R4 R5 U1 1000F/6.3V PSR16C30CT 4H BUK556 5m 10k, 5%, 1/8W 2.32k, 1%, 1/8W Various 1k, 1%, 1/8W 10, 5%, 1/8W SC1150CS Various Various SEMTECH 4 (c) 1998 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA PROGRAMMABLE DC/DC CONTROLLER March 11, 1998 SC1150 CHARACTERISTIC CURVES SC1150 Efficiency in Application circuit 16935E 100.0% Application circuit 16935E Ripple, 3.1V, 10A out 95.0% 90.0% 3.50V Set 3.00V Set Efficiency 85.0% 2.40V Set 80.0% 2.00V Set 75.0% 70.0% 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 Output Current (Amps) Application circuit 16935E Transient Response, 3.1V, 0.3A to 10A SC1150 Regulation in Application circuit 16935E 0.050 Vo at Io=300mA steady state Voltage change (V) normalized at Io=2A 0.040 0.030 0.020 0.010 0.000 Vo at Io=10A steady state -0.010 Steady state voltage levels are superimposed for reference. -0.020 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 Output Current (Amps) 5 (c) 1998 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA PROGRAMMABLE DC/DC CONTROLLER March 11, 1998 SC1150 OUTLINE DRAWING SO-16 LAND PATTERN SO-16 6 (c) 1998 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA |
Price & Availability of SC1150CS
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |