sc1154 Semtech Corporation, sc1154 Datasheet
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sc1154
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sc1154 Summary of contents
Page 1
... D/A converter provides programmability of out- put voltage from 2.0V to 3.5V in 100mV increments and 1.3V to 2.05V in 50mV increments with no external components. The SC1154 high side driver can be configured as ei- ther a grounded reference floating bootstrap driver. High and low side drivers have a peak current rating of 2 amps. ...
Page 2
... Lead Temperature (Soldering) 10 seconds Storage Temperature © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS Symbol VIN MAX STG 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 Maximum Units -0 ...
Page 3
... Programming Input (LSB). (1) 28 PWRGD Power Good. This open collector logic output is high if the output voltage is within 5% of the set point. © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 DS(ON) LOAD 3 ...
Page 4
... UVLO threshold during start-up 200kHz, BOOT = 13V, BOOTLO = 0V 50pF DH 11.4V < VIN12V < 12.6V, over full VID REF range (see Output Voltage Table) TH(H) TH( 5mA SAT O OVP 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 MIN TYP MAX UNITS 11 µ 2. ...
Page 5
... V = 11.9V IOUT_ACC HISENSE IOUTLO V = 0.5V 12V, IOUT IOUT HISENSE V = 11.5V IOUTLO V = 0.05V 12V, IOUT IOUT HISENSE V = 12V IOUTLO V = 11V, HISENSE R = 10k0hm IOUT 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 MIN TYP MAX UNITS 10.4 13 15.6 µ 2.0 2.4 V 9.25 10 10.75 V 1 µ ...
Page 6
... DRV DRV DRV duty cycle < 2%, tpw < 100us, HIGHDR’ 125 C HIGHDR 6.5V, V BOOT BOOTLO HIGHDR = 1.5V (src HIGHDR (sink) (Note 1) 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 MIN TYP MAX UNITS 0 2 1.0 V 2. ...
Page 7
... LOWDR 10mV overdrive, 1.3V < Vref < 3. 9nF 6.5v, HIGHDR BOOT V = grounded, HIGHDR BOOTLO T = 125 ° 9nF 6.5v, DRV T = 125 °C LOWDR J 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 MIN TYP MAX UNITS 150 250 µ µs 1 µ ...
Page 8
... LOSENSE grounded VDSRED 3v < V < 11v SWXDLY HISENSE LOSENSE HISENSE PWRGD t overdrive = 10mv SLST t NUL 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 MIN TYP MAX UNITS 2 µs 3 µs 3 µs 300 500 ns 30 100 ns 1 µs ...
Page 9
... PRELIMINARY - March 1, 2000 BLOCK DIAGRAM © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 9 ...
Page 10
... MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 VID0 VDC (V) 1 1.30 0 1.35 1 1.40 0 1.45 1 1.50 0 1.55 1 1.60 0 1.65 1 1.70 0 1.75 1 1.80 0 1.85 1 1.90 0 1.95 1 2. CPU 0 2. ...
Page 11
... VOUT during a low to high load current transient. The overshoot during a high to low load current transient is reduced by subtracting the voltage that is on the DROOP pin from VREF. The voltage on the IO pin is divided down with an external 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 11 ...
Page 12
... The drive regulator provides drive voltage to the low side driver, and to the high side driver when the high side driver is configured as a floating driver. The mini- mum drive voltage is 7V. The minimum short circuit current is 100mA. is also the current 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 12 ...
Page 13
... PRELIMINARY - March 1, 2000 APPLICATION CIRCUIT © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 13 ...
Page 14
... AVX 0.1µF 0.33µF 470µF, 6.3V (TPS) AVX 2.2µF, 16V MBRD1035 MOT 1µH, DO5022P-102 Coilcraft 1.5µH, DO5022P-152HC Coilcraft IRL3103NS, D2PAK Int. Rect. IRL2203NS, D2PAK Int. Rect 2.7K 100 20K 150 10K 2.2 3.9 SC1154, SO-28 SEMTECH 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 Vendor Notes 14 ...
Page 15
... PRELIMINARY - March 1, 2000 EVALUATION BOARD ARTWORK © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS TOP LAYER BOTTOM LAYER 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 15 ...
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... PRELIMINARY - March 1, 2000 EVALUATION BOARD LAYOUT © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS TOP VIEW BOTTOM VIEW 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 16 ...
Page 17
... PRELIMINARY - March 1, 2000 TEST DATA 100.0 95.0 90.0 85.0 % 80.0 75.0 70.0 65.0 60.0 0 5.00 4.00 3.00 2.00 1.00 % 0.00 0 -1.00 -2.00 -3.00 -4.00 -5.00 © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS SC1154 Efficiency Vo Vin = Output Current, A SC1154 Voltage Regulation Output Current, A 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 3.5 2.8 2.0 1.5 20 3.5 2 1.5 17 ...
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... PRELIMINARY - March 1, 2000 OUTLINE - SO-28 ECN00-904 © 2000 SEMTECH CORP. PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1154 18 ...