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OCP3601 Dataheets PDF



Part Number OCP3601
Manufacturers OCS
Logo OCS
Description Step-Up DC/DC Controller
Datasheet OCP3601 DatasheetOCP3601 Datasheet (PDF)

OCP3601 Step-Up DC/DC Controller  General Description The OCP3601 is a boost topology switching regulator control IC for battery-used applications field. The OCP3601 includes a totem-pole single output stage for driving NPN transistor or N-MOS, high precision reference (0.5V) for comparing output voltage with feedback amplifier, an internal dead-time control for controlling the minimum duty cycle, programmable soft start with short circuit protection function and logic level control for operat.

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OCP3601 Step-Up DC/DC Controller  General Description The OCP3601 is a boost topology switching regulator control IC for battery-used applications field. The OCP3601 includes a totem-pole single output stage for driving NPN transistor or N-MOS, high precision reference (0.5V) for comparing output voltage with feedback amplifier, an internal dead-time control for controlling the minimum duty cycle, programmable soft start with short circuit protection function and logic level control for operating mode or standby mode.           Features Wide supply voltage operating range: 1.8 to 15V Reference voltage precision: 4% Low current consumption: Operation Mode 5.5mA Standby-by Mode: 1μA High speed oscillator frequency: 1MHz max Programmable Soft Start function (SS) Short Circuit Protection function (SCP) Totem-pole output with adjustable on/off current (for NPN transistors or n-channel MOSFET) Logic level control stand-by mode function Package: SOP8/MSOP8/TSSOP8  Typical Application    Digital Camera PDA Portable Equipment  Pin Assignment SOP8 MSOP8 TSSOP8 FB 1 SCP 2 8 7 COMP OSC GND OUT FB SCP Vcc BR/CTL 1 2 3 4 8 COMP OSC GND OUT FB SCP Vcc 1 2 3 8 7 COMP OSC GND OUT OCP3601 Vcc BR/CTL 3 4 6 5 OCP3601 7 6 5 OCP3601 6 5 BR/CTL 4  Pin Description Name FB SCP VCC BR/CTL OUT GND OSC COMP No. 1 2 3 4 5 6 7 8 I/O I I P I O P I O Description Error amplifier inverting input pin Connected a capacitor Soft start and SCP function pin IC Power supply Output current setting and control pin Totem-pole output IC ground Capacitor and resistor connected for the frequency of oscillation Error amplifier compensation output Page1 - 17 Rev. 1.1 Sep 26, 2005 Free Datasheet http://www.Datasheet4U.com OCP3601 Step-Up DC/DC Controller  Functional Block Diagram 3 7 Reference voltage supply 1.25V 1 + 0.6V0.1VSawtooth wave oscillator 0.1V PWM Comp. + + + 5 36k Ω Output drive control circuit 30KΩ Error Amp. 0.5V 500Ω DTC0.6V 0.22V 8 Soft start SCP 2 4 6  Order Information Part Number OCP3601S OCP3601SA OCP3601TS OCP3601TSA OCP3601MS OCP3601MSA Operating Temperature -10℃ ~ +85℃ -10℃ ~ +85℃ -10℃ ~ +85℃ -10℃ ~ +85℃ -10℃ ~ +85℃ -10℃ ~ +85℃ Package SOP8 SOP8 TSSOP8 TSSOP8 MSOP8 MSOP8 Description Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel Page2 - 17 Rev. 1.1 Sep 26, 2005 Free Datasheet http://www.Datasheet4U.com OCP3601 Step-Up DC/DC Controller  Absolute Maximum Ratings Power supply voltage Output source current Output sink current Allowable dissipation Operating temperature Storage temperature SOP8 lead Temperature (solding,10 sec) TSSOP8 Lead Temperature (solding,10 sec) MSOP8Lead Temperature (soldering,10 sec) SOP8 MSOP8 TSSOP8 +15V -50mA +50mA T a≦+25℃ T a≦+25℃ T a≦+25℃ -10℃∽+85℃ -55℃∽+125℃ +260 ℃ +260 ℃ +260 ℃ 570mW 400mW 400mW  DC Electrical Characteristics Under Voltage Lock-Out section (U.V.L.O.) Parameter Symbol Low threshold voltage V LOW Upper threshold voltage V UPPER Soft Start section (S.S.) Parameter Input source current Soft start threshold voltage Test Conditions Min. 1.1 Typ. 1.3 Max. 0.9 1.5 Unit V V Symbol ISS VSST Test Conditions V SCP=0V Min. -1.5 0.8 Typ. -1.0 0.9 Max. -0.7 1.0 Unit μA V Short Circuit Protection section (S.C.P.) Parameter Symbol Input source current ISCP S.C.P. threshold voltage V SCP Oscillator section Parameter Oscillation frequency Frequency change with voltage Frequency change with temperature Idle Period Adjustment section Parameter Maximum duty cycle Total device section Parameter Stand-by current Average supply current Test Conditions V SCP=0V Min. -1.5 0.7 Typ. -1.0 0.8 Max. -0.7 0.9 Unit μA V Symbol f Δf/ΔV Δf/ΔT Test Conditions R T=3.0KΩ, CT=270pF V CC=2V to 15V Ta =0℃ to 85℃ Min. 400 Typ. 500 2 5 Max. 600 10 Unit KHz % % Symbol T DUTY Test Conditions R T=3.0KΩ, CT=270pF,V FB=0.8V Min. 75 Typ. Max. 85 Unit % Symbol ISTANDBY IAVE Test Conditions Pin4 is open or VCC RB =390Ω , V CC=0 ∽20V Min. Typ. 5.0 Max. 1 10 Unit μA mA Page3 - 17 Rev. 1.1 Sep 26, 2005 Free Datasheet http://www.Datasheet4U.com OCP3601 Step-Up DC/DC Controller  DC Electrical Characteristics (Cont.) Error Amplifier section Parameter Input threshold voltage VT change with voltage VT change with temperature Input basic current Voltage Gain Frequency bandwidth Output voltage Positive Swing Negative Output source current Output sink current Output section Parameter Output high voltage Output high voltage Output saturation voltage Output saturation voltage Output source current Output sink current Internal pull-down resistor Symbol V FB ΔVFB /ΔV ΔVFB /ΔV IB AV BW VPOS VNEG ISOURCE ISINK Test Conditions V COMP=450mV V CC=2V to 15V T a=-10℃ to 85℃ Min. 480 Typ. 500 5 1 -0.2 100 6 0.87 0.05 -40 40 Max. 520 20 1.0 Unit mV mV % μA V/V MHz V μA μA -1.0 AV =0dB 0.78 V COMP=450mV 0.2 -24 24 Symbol V OH1 V OH2 VOl1 VOl2 IOSOURCE IOSINK RO Test Conditions R B=390Ω ,IO=-15mA R B=750Ω ,IO=-10mA,VCC =1.8V R B=390Ω ,IO=15mA R B=750Ω ,I.


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