SC1112TSTRT Semtech, SC1112TSTRT Datasheet
SC1112TSTRT
Specifications of SC1112TSTRT
Related parts for SC1112TSTRT
SC1112TSTRT Summary of contents
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... C10 FC AGPSEL DELAY VTTSEL 22n C5 PWRGD VTTIN VTT SELECT Signal 1 SC1112 Triple Low Dropout Regulator Controllers III Motherboards ® C1 10u Q3 C14 330u C2 C18 Q1 330u C16 C17 330u 0.1u C19 C8 C9 330u 330u 0.1u AGP SELECT Signal www.semtech.com +3.3V +5V STBY AGP VTT ...
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... Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied Electrical Characteristics Unless specified: 5VSTBY=4.75V to 5.25V; VTTIN=3.3V 2006 Semtech Corp 25° SC1112 ° ° ° ° ° ° www.semtech.com µ µ ...
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... PWRGD pin is kept low during the power up, until the VTT output has reached its PG source current I (20uA) is enabled and will start charging the external PWRGD delay capacitor connected to the DELAY pin. Once the PG capacitor is charged above the PG Delay_TH 2006 Semtech Corp. = 25° ...
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... VTTIN has reached 1.5V and VTT is below the short circuit threshold of 0.7V. VTTGATE initially turns on hard and is latched off when DELAY reaches 1.5V and VTT is below 0.7V 2006 Semtech Corp. NORMAL STARTUP CONDITION VTTIN VTTIN=1.5V VTT DELAY DELAY=1.5V PWRGD ...
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... VTT drops below 0.7V, the delay capacitor begins charging. If VTT recovers above 0.7V before DELAY reaches 1.5V, DELAY is again discharged. If VTT reaches 1.08V the delay capacitor begins charging and normal operation continues. 2006 Semtech Corp. SHORT-CIRCUIT DURING NORMAL OPERATION VTTIN VTT VTT=0.7V VTT=1.08V DELAY DELAY=1 ...
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... POWER MANAGEMENT Pin Configuration Top View 5VSTBY 1 16 PWRGD 15 2 DELAY 3 14 VTTSEL 4 13 AGPSEL 5 12 ADJGATE 6 11 ADJSEN 7 10 CAP (16-Pin SOIC or TSSOP) 2006 Semtech Corp. Ordering Information GND VTTIN VTTGATE VTTSEN AGPGATE AGPSEN CAP Notes: (1) Only available in tape and reel packaging. A reel contains 2500 devices ...
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... POWER MANAGEMENT Pin Descriptions NOTE: (1) All logic level inputs and outputs are open collector TTL compatible. 2006 Semtech Corp SC1112 www.semtech.com ...
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... POWER MANAGEMENT Block Diagram 5VSTBY Bandgap Reference + - VTTIN DELAY _ + PWRGD 2006 Semtech Corp. VTTSEL 1.5V 1.35V Disable1.5 1. 1.08V Vref 0. 1.5V Disable1 Vref 0.7V Oscillator + _ VTTSEN ChargePump + _ Pwrgd Threshold GND AGPSEL CAP+ CAP- 8 SC1112 FC 1.5V + VTTGATE _ VTTSEN 1. Disable1.2 FC 1.5V AGPGATE + _ AGPSEN + _ Disable3 ...
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... Ta (°C.) VTT Input Supply Threshold vs Ta 1.498 1.497 1.496 1.495 1.494 1.493 1.492 1.491 (°C.) 2006 Semtech Corp. VTT(1.5V) Output Voltage @ 1.5035 1.5030 1.5025 1.5020 1.5015 1.5010 1.5005 5V Stby = 5.25V 5V Stby = 5.00V 5V Stby = 4.75V 1.5000 1.4995 VTT(1.5V) Output Voltage @ 1.2465 1.2460 1 ...
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... VTT Gate Current @ Vgate = 3V, 5V Stby = 4.75V vs Ta 800 750 700 650 600 550 500 450 400 (°C.) 2006 Semtech Corp. VTT Short circuit Delay source current vs Ta 23.60 Source current Sink current 23.40 23.20 23.00 22.80 22.60 22.40 22.20 22.00 21.80 21.60 50 ...
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... Ta (°C.) 2006 Semtech Corp. VTT (1.25V) Power Good Delay Time vs Ta 8.40 8.30 8.20 8.10 8.00 7.90 5V Stby = 5.25V 5V Stby = 5.00V 5V Stby = 4.75V 7.80 7. VTT (1.5V) Power Good Delay Time ...
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... Ta (°C.) AGP Sense Bias current vs Ta 142 140 138 136 134 132 130 128 (°C.) 2006 Semtech Corp. AGP (1.5V) Output Voltage @ 1.5035 1.5030 1.5025 1.5020 1.5015 1.5010 1.5005 1.5000 1.4995 5V Stby = 5.25V 5V Stby = 5.00V 5V Stby = 4.75V 1.4990 1.4985 50 60 ...
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... Ta (°C.) ADJ Sense Bias current vs Ta 350 330 310 290 270 250 230 210 190 170 150 (°C.) 2006 Semtech Corp. ADJ (1.2V) Output Voltage @ 1.1955 1.1950 1.1945 1.1940 1.1935 1.1930 5V Stby = 5.25V 1.1925 5V Stby = 5.00V 5V Stby = 4.75V 1.1920 1.1915 ADJ Gate Current @ Vgate = 3V, 5V Stby = 4.75V vs Ta 900 5V Stby = 4 ...
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... Ta (°C.) Charge Pump Output Voltage vs Ta 9.32 9.31 9.30 9.29 9.28 9.27 9.26 9.25 9.24 9.23 9.22 9. (°C.) 2006 Semtech Corp. 1.60 1.55 1.50 1.45 1.40 1.35 1.30 5V Stby = 5.25V 5V Stby = 5.00V 1.25 5V Stby = 4.75V 1. Load Regulation VTTIN = 3. 180.0E-3 170.0E-3 160 ...
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... Phase -10 -20 -30 10 100 1000 10000 Freq (Hz) SC1112 Gain / Phase ADJ = 1. Gain 30 20 Phase 10 0 -10 -20 -30 10 100 1000 10000 Freq (Hz) 2006 Semtech Corp. 200 60 Gain Phase (deg) 180 50 160 40 140 30 120 20 100 - -30 100000 1000000 10 100 200 50 Gain Phase (deg) ...
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... PWRGD pin is released from Delay_TH ground. A detailed timing diagram is shown on pages 2006 Semtech Corp. Also included is an overcurrent protection circuit that monitors the VTT voltage. If the output voltage drops below 700mV, as would occur during an overcurrent or short condition, the device will pull the drive pin low and latch off the output ...
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... MOSFET. Assuming that the MOSFET gate threshold voltage is sufficiently low for the output voltage chosen and a worst-case drive voltage of 9V given by: V VTTIN I OUT ( MAX ) ( MIN ) OUT 2006 Semtech Corp. C3 0.1u GND Q3 AGPGATE AGPSEN C2 C18 VTTGATE Q1 330u VTTSEN AGPSEL VTTSEL ...
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... MOSFET (VTTIN) will help to hold up the power supply during fast load changes, thus improving overall transient response. The +5VSTBY supply should be bypassed with a 10µF ceramic capacitor. 2006 Semtech Corp. Layout Guidelines One of the advantages of using the SC1112 to drive an external MOSFET is that the bandgap reference and of the MOSFET ...
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... POWER MANAGEMENT Evaluation Board Gerbers Board Layout Assembly Top Board Layout Top 2006 Semtech Corp. Board Layout Assembly Bottom Board Layout Bottom 19 SC1112 www.semtech.com ...
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... POWER MANAGEMENT Evaluation Board Schematic 2006 Semtech Corp. 20 SC1112 www.semtech.com ...
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... POWER MANAGEMENT Evaluation Board Bill of Materials 2006 Semtech Corp SC1112 www.semtech.com ...
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... DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS 3. OR GATE BURRS. 4. REFERENCE JEDEC STD MO-153, VARIATION AB. Land Pattern - TSSOP-16 X (C) P NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. 2006 Semtech Corp. INCHES DIM D MIN NOM .002 .031 A2 b ...
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... Minimum Land Pattern - SO-16 X (C) P NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. 2. REFERENCE IPC-SM-782A, RLP NO. 304A. Contact Information Phone: (805)498-2111 FAX (805)498-3804 2006 Semtech Corp. INCHES A DIM MIN .053 N A1 .004 A2 ...