NIKO-SEM N1153 5 Bit Programmable Synchronous DC/DC Controller GENERAL DESCRIPTION FEATURES The N1153 is a low-cost, 5 bit TTL-compatible input, digital-to-analog (DAC) programmable, synchronous buck converter controller designed specifically to power the Pentium ® II as well as the next generation of P6 family or other high performance core logic in desktop personal computer CPU applications. z High performance and low cost solution z Synchronous operation with high efficiency z TTL-compatible 5 bit DAC, output voltage selection from 1.3V to 3.5V programmable z High current totem pole output, up to 2 A for direct driving of the external N-Channel power MOSFETs. z 200 KHz fixed frequency internal oscillator z Fast transient response z Power-Good output voltage monitor z Over-Voltage and Over-Current protection Additional features also include temperature compensated voltage reference, triangle wave oscillator, current limits comparator, frequency shift over-current protection, and an accessible, internally compensated error amplifier, power good signal, logic compatible shutdown, and over voltage protection are also provide. The N1153 operates at a fixed 200KHz, providing an optimum compromise between efficiency, external component size, and cost. APPLICATIONS z Powering Pentium ® II, III or Deschutes, K6 and other advanced processor z Multiple microprocessor supplies z High power DC to DC controller z Programmable power supplies TYPICAL APPLICATION 12V 5V + VID 0 D/A AND SHUT-DOWN LOGIC CURRENT LIMIT COMPARATOR TEMP. COMPENSATED VOLTAGE REFERENCE FREQUENCY SHIFT OVER-CURRENT PROTECTION + VID 1 VID 2 VID 3 VCORE + VID 4 P.G S.D TRIANGLE WAVE OSCILLATOR INTERNALLY COMPENSATED ERROR AMPLIFIER N1153, Motherboard Power Regulation for Computers 1 AUG-03-2001 NIKO-SEM N1153 5 Bit Programmable Synchronous DC/DC Controller ABSOLUTE MAXIMUM RATINGS z VCC to GND, VIN - 0.3V to 7V z BST to GND -0.3V to 15V z Thermal Resistance Junction to Case, θJC z Thermal Resistance Junction to Ambient, θJA 30 °C/W 90 °C/W z Operating Temperature Range, TA z Operating Junction Temperature Range, TJ z Storage Temperature Range, TSTG z Lead Temperature, TLEAD (Soldering, 10 Seconds) 0 to 70 °C 0 to 125 °C -65 to 150 °C 300 °C ELECTRICAL SPECIFICATIONS <Unless specified: VCC = 4.75V ~ 5.25V, GND = PGND = 0V, VOSENSE = VO , 0mV < (CS+ - CS-) < 60mV, TA = 25°C> PARAMETER Supply Voltage Supply Current Output Voltage Load Regulation Line Regulation Gain (AOL) Current Limit Voltage Oscillator Frequency Oscillator Max Duty Cycle Peak DH Sink/Source Current Peak DL Sink/Source Current OVP Threshold Voltage OVP Source Current Power-Good Threshold Voltage Dead Time CONDITIONS VCC VCC = 5.0V IO = 2A IO = 0.3A to 15A All VID Codes VOSENSE to VO BSTH - DH = 4.5V, DH - PGNDH = 2V BSTL - DL = 4.5V, DL - PGNDL = 2V VOVP = 3.0V 2 MIN 4.2 TYP MAX UNITS 7 5 See Table 1. 1 0.5 35 60 70 80 180 200 220 90 95 1 1 120 10 85 115 100 200 V mA % % dB mV KHz % A A % mA % nS AUG-03-2001 NIKO-SEM 5 Bit Programmable Synchronous DC/DC Controller N1153 PIN CONFIGURATIONS PIN DEFINITIONS Pin # Pin Name Pin Function Description 1 GND Small signal analog and digital ground 2 VCC Input voltage 3 OVP High signal out if VO>set point +20% 4 PWRGOOD* Open collector logic output, high if VO within 10% of set point 5 CSCurrent sense input (Negative) 6 CS+ Current sense input (Positive) PGNDL Power ground for high side switch 7 8 DH High side driver output 9 NC No connected 10 PGNDL Power ground for high side switch 11 DL Low side driver output 12 BSTL Supply for low side driver 13 BSTH Supply for high side driver 14 SHUTDOWN Logic low shuts down the converter 15 VOSENSE Top end of internal feedback chain 16 VID4* Programming input (MSB) 17 VID3* Programming input 18 VID2* Programming input 19 VID1* Programming input 20 VID0* Programming input (LSB) * : All logic level inputs and outputs are open collector TTL compatible. 3 AUG-03-2001 NIKO-SEM 5 Bit Programmable Synchronous DC/DC Controller N1153 OUTPUT VOLTAGE <Unless specified: VCC = 4.75V ~ 5.25V, GND = PGND = 0V, VOSENSE = VO , 0mV < (CS+ - CS-) < 60mV, LDOV = 11.4V ~ 12.6V, TA = 25°C> − Table 1 − VID Min. Typ. Max. 43210 (V) (V) (V) 01111 1.274 1.300 1.326 01110 1.323 1.350 1.377 01101 1.372 1.400 1.428 01100 1.421 1.450 1.479 01011 1.470 1.500 1.530 01010 1.527 1.550 1.573 01001 1.576 1.600 1.624 01000 1.625 1.650 1.675 00111 1.675 1.700 1.726 00110 1.724 1.750 1.776 00101 1.773 1.800 1.827 00100 1.822 1.850 1.878 00011 1.871 1.900 1.929 00010 1.921 1.950 1.979 00001 1.970 2.000 2.030 00000 2.019 2.050 2.081 11111 1.940 2.000 2.060 11110 2.058 2.100 2.142 11101 2.156 2.200 2.244 11100 2.254 2.300 2.346 11011 2.352 2.400 2.448 11010 2.450 2.500 2.550 11001 2.548 2.600 2.652 11000 2.646 2.700 2.754 10111 2.744 2.800 2.856 10110 2.842 2.900 2.958 10101 2.940 3.000 3.060 10100 3.038 3.100 3.162 10011 3.136 3.200 3.264 10010 3.234 3.300 3.366 10001 3.332 3.400 3.468 10000 3.430 3.500 3.570 Note: IO = 2.0A in Application Circuit 4 AUG-03-2001 NIKO-SEM N1153 5 Bit Programmable Synchronous DC/DC Controller APPLICATION CIRCUIT Mn-Cu Wire 10mOHM x 2 2 uH MOSFET P50N02L x 2 1000uF x 2 4uH 1500uF x 4 0.1uF 5V VCORE + 1000uF + 0.1uF + + SBD 1A/30V 10 + + + 10K 1K 0.1uF VID 0 DL VID 1 VID 1 CS+ VID 2 VID 2 CS- VID 3 VID 3 VO SENSE VID 4 VID 4 SHUTDOWN P.G OVP 12V POWERGOOD NC OVP PGNDH BSTH PGNDL BSTL GND + 2.32K VID 0 0.1uF DH VCC X N1153 S.D 5 AUG-03-2001 NIKO-SEM N1153 5 Bit Programmable Synchronous DC/DC Controller SOIC-20 (DW) MECHANICAL DATA mm Dimension Min. Typ. mm Dimension Max. Min. Typ. Max. A 12.6 13.0 H 0.4 1.27 B 7.3 7.7 I 0.23 0.32 C 10 10.65 J 0.25 0.74 D 0.33 0.51 K 0° 8° E 1.27 F 2.1 G 0.1 2.3 L 2.5 M 0.3 N 6 AUG-03-2001