OCP2030 SWITCHING BUCK REGULATOR 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 z z z z z z z 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. 350KHz Programmable Soft-Start function (SS) Short Circuit Shutdown and Auto Re-start function(ARSCP) Built-in P-MOSFET for 3A loading capability Package: SOP8 Pin Configuration z Top View Name VCC No. 1 Status P SS/SCP 2 I IN- 3 I 6 FB 4 O 5 GND 1 8 2 7 3 OCP2030 4 LX 5 6 7 8 Description IC Power Supply (PMOS Source) Connecting with a Soft-start & ARSCP timing capacitor Error Amplifier Inverting Input Error Amplifier Compensation Output P IC Ground O PMOS High Current Output Block Diagram 1 Reference Regulator Oscillator Thermal Shuntdown 1.25V 36KΩ 3 Output drive control circuits 500Ω 0.5V 0.7V 4 Soft start&Auto Re-start S.C.P Circuits 5 6 2 Page1 - 7 7 8 Rev. 1.0 Feb.07, 2007 OCP2030 SWITCHING BUCK REGULATOR Absolute Maximum Ratings Power supply voltage Output source current Error amplifier inverting input Allowable dissipation SOP8 Ta≦+25℃ Operating temperature Storage temperature SOP8 Lead Temperature (soldering, 10 sec) +20V +3A -0.3V~+1.2V 650mW -10℃∼+85℃ -55℃∼+125℃ +260℃ DC Electrical Characteristics Electrical characteristics over recommended operating free-air temperature range, VCC=6V, (unless otherwise noted) Reference Parameter Output voltage Input regulation Symbol VREF ∆VREF Output voltage change with temperature ∆VREF/VREF Soft Start (S.S.) Parameter S.S. Source current Soft start threshold voltage Short-circuit protection (S.C.P.) Parameter S.C.P source current SCP re-start/hold time S.C.P threshold voltage Test Conditions COMP connected to FB Vcc=3.0V to 20V TA=-10℃ to 25℃ TA=25℃ to 85℃ Min. 0.490 Typ. 0.5 2 1 1 Max. 0.510 12.5 2 2 Unit V mV Symbol ISS VSST Test Conditions VSS= 0V - Min. -15 0.8 Typ. -10 0.9 Max. -7 1.0 Unit µA V Symbol ISCP TRS/THOLD VSCP VSB Test Conditions VSCP=0V VCOMP>0.8V VFB>450mV VFB<450mV Min. -15 Typ. -10 1/20 1.0 0.1 Max. -7 Unit µA - Symbol f ∆f/∆V ∆f/∆T Test Conditions Min. 300 - Typ. 350 5 5 Max. 400 0.9 % 1.1 0.15 V Oscillator Parameter Frequency Frequency change with voltage Frequency change with temperature Error amplifier Parameter Input threshold voltage VTchange with voltage VTchange with temperature Input bias current Voltage Gain Frequency bandwidth Positive Output voltage Swing Negative Output source current Output sink current Symbol VIN∆VIN-/ ∆V ∆VIN-/ ∆T IB Av BW VPOS VNEG ISOURCE ISINK Page2 - 7 Vcc=3.0 V to 20V TA=--10℃ to 85℃ Test Conditions VFB=450mV VCC=3V to 20V Ta = -10℃to 85℃ --Av=0 dB VIN-=0.3V VIN-=0.7V VFB=450mV Min. 490 -1.0 0.78 30 Typ. 500 5 1 -0.2 100 6 0.87 0.05 -45 45 - Max. 510 20 1.0 0.2 -30 - Unit KHz % % Unit mV mV % µA V/V MHz V µA µA Rev. 1.0 Feb.07, 2007 OCP2030 SWITCHING BUCK REGULATOR DC Electrical Characteristics (Continuous) Idle Period Adjustment Parameter Maximum duty cycle Symbol TDUTY Test Conditions VIN- =0.2V Min. - Typ, 80 Max. - Unit % Parameter PMOS D-S voltage PMOS source current Symbol VDSS ID Test Conditions VFB=0.1V Min. Max. - Unit V A PMOS On resistance RDS(ON) VCC=5.0V, VIN-=0V VCC=10V, VIN-=0V Output leakage current IL SCP active Typ, -25 -2 70 42 5 Symbol ISTANDBY Test Conditions Typ. 4.5 Max. 6 Output 90 65 - mΩ µA Total device Parameter Standby supply current Min. - Unit mA Typical Application Circuit VIN 1 LX VCC VOUT 8 LX 7 OCP2030 + 2 SCP GND 5 IN- 3 + FB 4 GND 6 Page3 - 7 Rev. 1.0 Feb.07, 2007 OCP2030 SWITCHING BUCK REGULATOR Typical Characteristics Tempetature VS. Reference Output Voltage Power Supply Voltage VS. Reference Output Voltage 0.509 0.508 0.507 0.506 0.505 0.504 0.503 0.502 0.501 3.6 6 10 12 15 17 Power Supply Voltage (V) 20 Reference Output Voltage(V) Reference Output Voltage(V) 0.507 0.506 0.505 0.504 0.503 0.502 0.501 0.500 0.499 0.498 -25 Figure 1 25 50 75 100 Tempetature(°C) Figure 2 93 92 91 90 89 88 87 86 85 84 Output Load Regulation Vcc=10V,Vout=5.0V Output Voltage(V) Effciency(%) Output Current VS. Effciency Vcc=10V,Vout=3.3V 83 82 81 80 79 0.5 1 1.5 2 2.5 Output Current (A) 3 3.5 Figure 3 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 Vcc=10V,Vout=5.0V Vcc=10V,Vout=3.3V 2.0 1.5 1.0 0.5 0 0.5 1 1.5 2 2.5 Output Current (A) 3 3.5 Figure 4 Page4 - 7 Rev. 1.0 Feb.07, 2007 120 OCP2030 SWITCHING BUCK REGULATOR Timing Waveform Figure 7 PWM Timing Diagram Ordering Information OCP2030XXXX Package: S: SOP8 Output Voltage: Packing: Temperature Grade: Blank: ADJ Blank: Tube or Bulk Blank: -10~85℃ A: Tape & Reel Marking Information Logo OCP2030 Pin 1 sign YYWWXX A行 B行 Internal Code Date Code: YY: Year (07=2007) WW: Nth week (01~52) Page5 - 7 Rev. 1.0 Feb.07, 2007 OCP2030 SWITCHING BUCK REGULATOR H Package Information E θ L VIEW “A” 7°(4х) 7°(4х) 0.015х45° C A D e B VIEW “A” A1 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 θ 0.10 0° 8° Page6 - 7 0.004 0° 8° Rev. 1.0 Feb.07, 2007 OCP2030 SWITCHING BUCK REGULATOR Packing information W P 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 Page7 - 7 Rev. 1.0 Feb.07, 2007