General Description The OCP2030 is a buck topology of switching regulator for wide operating voltage applications field. The OCP2030 includes a high current P-MOSFET, high precision reference (0.5V) for comparing output voltage with feedback amplifier, an internal dead-time control and oscillator for controlling the maximum duty cycle and PWM frequency, and has power-on programmable soft start time and short circuit PMOS turn-off and auto re-start protection functions. Features Precision feedback reference voltage: 0.5V (2%) Wide supply voltage operating range: 3.0 to 20V Low current consumption: 5.5mA Internal fixed oscillator frequency: Typ. 500KHz Programmable Soft-Start function (SS) Short Circuit Shutdown and Auto Re-start function(arscp) Built-in P-MOSFET for 3A loading capability Package: SOP8 Typical Application Circuit Vin 1 VCC LX 8 Vout + 2 LX OCP2030 IN- SCP FB GND GND 5 6 7 3 4 + Pin Configuration 1 2 3 4 Top View OCP2030 8 7 6 5 Name No. Status Description VCC 1 P IC Power Supply (PMOS Source) SS/SCP 2 I Connecting with a Soft-start & ARSCP timing capacitor IN- 3 I Error Amplifier Inverting Input FB 4 O Error Amplifier Compensation Output GND 5 6 P IC Ground LX 7 8 O PMOS High Current Output Page1-8 Rev. 1.0 Jan 09, 2007
Block Diagram 1 Reference Regulator Oscillator 1.25V Thermal Shuntdown 3 0.5V 36KΩ 500Ω Output drive control circuits 0.7V 4 Soft start&auto Re-start S.C.P Circuits 5 6 2 7 8 Absolute Maximum Ratings Power supply voltage +20V Output source current +3A Error amplifier inverting input -0.3V~+1.2V Allowable dissipation SOP8 Ta +25 650mW Operating temperature -10 +85 Storage temperature -55 +125 SOP8 Lead Temperature (soldering, 10 sec) +260 DC Electrical Characteristics Electrical characteristics over recommended operating free-air temperature range, V CC =6V, (unless otherwise noted) Reference Output voltage V REF COMP connected to FB 0.490 0.5 0.510 V Input regulation V REF Vcc=3.0V to 20V 2 12.5 mv Output voltage change with temperature V REF /V REF T A =-10 to 25 1 2 T A =25 to 85 1 2 % Soft Start (S.S.) S.S. Source current I SS V SS = 0V -15-10 -7 µa Soft start threshold voltage V SST - 0.8 0.9 1.0 V Page2-8 Rev. 1.0 Jan 09, 2007
DC Electrical Characteristics (Continuous) Short-circuit protection (S.C.P.) S.C.P source current I SCP V =0V SCP -15-10 -7 µa SCP re-start/hold time T RS /T HOLD V COMP >0.8V 1/20 - S.C.P threshold voltage V SCP V FB >450mV 0.9 1.0 1.1 V SB V FB <450mV 0.1 0.15 V Oscillator Frequency f 400 500 600 KHz Frequency change with voltage f/ V Vcc=3.0 V to 20V - 5 % Frequency change with temperature f/ T T A =--10 to 85-5 - % Error amplifier Input threshold voltage V IN- V FB =450mV 490 500 510 mv V T change with voltage V IN- / V V CC =3V to 20V - 5 20 mv V T change with temperature V IN- / T Ta = -10 to 85-1 - % Input bias current I B -- -1.0-0.2 1.0 µa Voltage Gain Av -- - 100 - V/V Frequency bandwidth BW Av=0 db - 6 - MHz Output voltage Positive V POS V IN- =0.3V 0.78 0.87 - Swing Negative V NEG V IN- =0.7V - 0.05 0.2 V Output source current I SOURCE - -45-30 µa V FB =450mV Output sink current 30 45 - µa I SINK Idle Period Adjustment Parameter Symbol Test Conditions Min. Typ, Max. Unit Maximum duty cycle T DUTY V IN - =0.2V - 80 - % Output Parameter Symbol Test Conditions Min. Typ, Max. Unit PMOS D-S voltage V DSS V FB =0.1V -25 - V PMOS source current I D -2 A PMOS On resistance R DS(ON) V CC =5.0V, V IN- =0V 70 90 V CC =10V, V IN- =0V 42 65 mω Output leakage current I L SCP active 5 - µa Total device Standby supply current I STANDBY - 4.5 6 ma Page3-8 Rev. 1.0 Jan 09, 2007
Typical Characteristics Reference Output Voltage(V) 0.509 0.508 0.507 0.506 0.505 0.504 0.503 0.502 Power Supply Voltage Reference Output Voltage 0.501 3.6 6 10 12 15 17 20 Power Supply Voltage (V) Reference Output Voltage(V) 0.507 0.506 0.505 0.504 0.503 0.502 0.501 0.500 0.499 Tempetature Reference Output Voltage 0.498-25 25 50 75 100 120 Tempetature( C) Figure 1 Figure 2 Oscillator Frequency(KHz) 595 590 585 580 575 570 565 560 555 550 545 Power Supply Voltage Oscillator Frequency 540 3.6 6 10 12 15 17 20 Power Supply Voltage (V) Oscillator Frequency(KHz) 700 650 600 550 500 450 400 350 300 250 Tempetature Oscillator Frequency 200-25 25 50 75 100 120 Tempetature( C) Figure 3 Figure 4 Page4-8 Rev. 1.0 Jan 09, 2007
Typical Characteristics(Continues) Effciency(%) 93 92 91 90 89 88 87 86 85 84 83 82 81 80 Output Current Effciency Vcc=10V,Vout=5.0V Vcc=10V,Vout=3.3V 79 0.5 1 1.5 2 2.5 3 Output Current (A) 3.5 Output Voltage(V) 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 Output Load Regulation Vcc=10V,Vout=5.0V Vcc=10V,Vout=3.3V 0.5 1 1.5 2 2.5 3 Output Current (A) 3.5 Timing Waveform Figure 5 Figure 6 Figure 7 PWM Timing Diagram Page5-8 Rev. 1.0 Jan 09, 2007
Ordering Information OCP2030XXXX Package: S: SOP8 Output Voltage: Blank: ADJ Packing: Blank: Tube or Bulk A: Tape & Reel Temperature Grade: I: -10~85 Marking Information Logo 2030-VV Pin 1 sign YYWWXX Part Number 2030-AJ: ADJ Internal Code Date Code: YY: Year (07=2007) WW: Nth week (01~52) Page6-8 Rev. 1.0 Jan 09, 2007
Package Information E H L θ VIEW A 7 (4х) D 0.015х45 7 (4х) A e B A1 C VIEW A Y Symbol Dimensions In Millimeters Dimensions In Inches Min. Max. Min. Max. A 1.35 1.75 0.053 0.069 A1 0.10 0.25 0.004 0.010 B 0.33 0.51 0.013 0.020 C 0.19 0.25 0.007 0.010 D 4.80 4.98 0.189 0.196 E 3.81 3.99 0.150 0.157 e 1.27 0.050 H 5.79 6.20 0.228 0.244 L 0.41 1.27 0.016 0.050 Y 0.10 0.004 θ 0 8 0 8 Page7-8 Rev. 1.0 Jan 09, 2007
Packing information P W D Package Type Carrier Width (W) Pitch (P) Reel Size(D) Packing Minimum SOP8 12.0± 0.3 mm 4.0±0.1 mm 330±1 mm 2500 pcs Note: Carrier Tape Dimension, Reel Size and Packing Minimum Page8-8 Rev. 1.0 Jan 09, 2007