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| FA3630V FA3630V s Description FA3630V is a DC-DC converter controller. This IC can directly drive a Nch/Pch-MOSFET. This IC is suitable to reduce converter size because it has many functions in a small package TSSOP. CMOS IC For Switching Power Supply Control s Dimensions, mm TSSOP-16 16 9 s Features * Low input voltage: 2.5V to 6.5V * 2-channels PWM control: Rail-to-rail output Output impedance of output stage = 3.5 (typ.) Nch-MOSFET driving (Ch1) Nch/Pch-MOSFET driving (Ch2)(selected by SEL pin) * Low power consumption: 0.7mA (typ.) * ON/OFFcontrol: Standby current= 0.1A (typ.) * 2% high accuracy reference voltage * Adjustable soft start time and maximum duty cycle * Adjustable built-in timer latch for short circuit protection * Wide range of operation frequency: 100kHz to 1MHz * Package: TSSOP-16 (Thin and small) 4.4 6.40.1 5.2 0.070.05 1 8 0.17+0.02 -0.04 0~8 0.50.08 0.20.05 0.65 s Applications * Power supply for general equipment s Block diagram Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin symbol Description ON/OFF function Ch. 2 non-inverting input to error amplifier Ch.2 inverting input to error amplifier Ch. 2 output of error amplifier Selection of type of MOSFET drived Ground Soft start for Ch. 2 Ch. 2 output (for Nch or PchMOSFET) Ch.1 outout (for Nch-MOSFET) Soft start for Ch.1 Power supply Regulated voltage output Ch.1 output of error amplifier Ch.1 inverting input to error amplifier Timing capacitor for timer latch delay Oscillator timing capacitor ON/OFF IN2+ IN2- FB2 SEL GND CS2 OUT2 OUT1 CS1 VCC VREG FB1 IN1- CP CT 1 1.1max FA3630V s Absolute maximum ratings Item Power supply voltage Symbol Rating 6.5 -500 500 -0.3 to +6.5 -10 300 125 -20 to +85 -40 to +125 Unit V mA mA V mA mW C C C s Recommended operating conditions Item Power supply voltage Input voltage for logic input Oscillation frequency Symbol Min. 2.5 0 100 Max. 5.5 5.5 1000 Unit V V kHz VCC Source peak current of OUT1/2 IOUT+ Sink peak current of OUT1/2 IOUT- Input voltage for logic input VLOG Output current of VREG Total power dissipation* Junction temperature Ambient temperature Storage temperature * Ta 25C VCC VLOG fOSC IREGMAX Pd TJ TOP Tstg s Electrical characteristics (VCC=3.3V, Ta=25C, CT=100pF) Regulated voltage section for internal control blocks Item Regulated voltage Variation with output current Variation with supply voltage Variation with temperature Symbol Test condition Min. 2.156 Typ. 2.200 Max. 2.244 5 8 0.5 0.5 Unit V mV mV % % VREG VRGOUT VRGLIN VRGTa IREG=no load VREG=0 to 5mV VCC=2.5 to 5.5V Ta=-20 to +25C Ta=+25 to +85C Reference voltage section Item Reference voltage Variation with supply voltage Variation with temperature Symbol Test condition Min. 0.98 Typ. 1.00 1 0.5 0.5 Max. 1.02 5 Unit V mV % % VREF VRGLIN VRGTa VCC=2.5 to 5.5V Ta=-20 to +25C Ta=+25 to +85C Oscillator section Item Oscillation frequency High level voltage Low level voltage Variation with supply voltage Variation with temperature Symbol Test condition Min. 437 Typ. 485 1.39 0.77 1 5 5 5 Max. 533 Unit kHz V V % % % fOSC VOSCH VOSCL fdV fdT CT=100pF CT=100pF CT=100pF VCC=2.5 to 5.5V Ta=-20 to +25C Ta=+25 to +85C Error amplifier section Item Input offset voltage Common mode input voltage DC open loop gain Unity gain band width Output sink current Output source current Symbol Test condition Min. Typ. 3 0.2 70 75 1.6 2.5 -125 3.0 -90 Max. 10 1.5 Unit mV V dB MHz mA A VIOF VICOM AVOL fT IFBL IFBH VFB=0.5V VFB=VREG-0.5V 2.0 -160 2 FA3630V ON/OFF logic input signal section Item Input range for ON mode Input range for OFF mode Symbol Test condition Min. 2.0 0.5 Typ. Max. Unit V V VONH VONL VCC=2.5V to 5.5V VCC=2.5V to 5.5V SEL logic input signal section Item Input range for driving Nch-MOSFET Input range for driving Pch-MOSFET Symbol Test condition Min. Typ. Max. Unit V 0.5 V VSELH VSELL Vcc-0.5 Timer latch protection section Item Threshold voltage of CP Charge current of CP Threshold voltage of FB1/FB2 Symbol Test condition Min. 1.55 -2.5 1.56 Typ. 1.70 -2.1 1.73 Max. 1.85 -1.7 1.90 Unit V A V VCPTH ICP VFBTL VCP=VREG-0.5V Soft-start section Item Threshold voltage of CS1/2 Threshold voltage of CS1/2 Symbol Test condition Duty cycle=0% Duty cycle=100% Min. 0.74 1.29 Typ. 0.79 1.34 Max. 0.84 1.39 Unit V V VCS 0 VCS 100 Output section Item ON resistance Rise time OUT1 ( High / Low ) OUT2 ( High / Low ) OUT1 OUT2 Fall time OUT1 OUT2 Symbol Test condition Min. Typ. 3.5 3.5 25 25 25 25 Max. 7 7 35 35 35 35 Unit ns ns ns ns RON tr tf IOUT=100mA VCC=3.3V CLOAD=1000pF VCC=3.3V CLOAD=1000pF VCC=3.3V Overall device Item Standby current Operating average current Symbol Test condition ON/OFF=GND OUT1, OUT2: Open Output duty=100% (Reference value) OUT1, OUT2: Open IN- and FB: Shorted 1.5 mA Min. Typ. 0.1 0.7 Max. 5 1 Unit A mA ICC0 ICC 3 FA3630V s Characteristic curves (Ta=25C) Supply current (ICC) vs. supply voltage (VCC) Oscillation frequency (fOSC) vs. timing capactior(CT) 1.1 1 0.9 0.8 10000 0.6 0.5 0.4 fosc [kHZ] ICC [mA] 0.7 1000 100 0.3 0.2 0.1 0 0 1 2 3 4 5 6 10 10 100 500 1000 VCC [V] CT [pF] Output duty cycle vs. FB terminal voltage (VFB) 100 90 80 Output duty cycle vs. CS terminal voltage (VCS) 100 90 80 Output duty cycle [%] Output duty cycle [%] 70 60 50 40 30 20 10 0 0 0.5 1 1.5 2 70 60 50 40 30 20 10 0 0 0.5 1 1.5 2 VFB [V] VCS [V] Oscillation frequency (fOSC) vs. ambient temperature (Ta) Reference voltage (VREF) vs. ambient temperature (Ta) 500 Vcc=3.3V CT=100pF 490 1.01 1.005 fOSC [kHZ] 480 470 VREF [V] 1 460 0.995 450 440 - 30 0.99 - 30 - 10 10 30 50 70 90 - 10 10 30 50 70 90 Ta [C] Ta[C] 4 FA3630V L-level output voltage (VOL1) vs. output sink current (Isink1) 2.4 2.2 2 1.8 1.6 H-level output voltage (VOH1) vs. output source current (ISOURCE1) 2.4 2.2 2 1.8 VOL1 [V] 1.4 VCC=3.3V 1.2 1 0.8 0.6 0.4 0.2 0 0 50 100 150 200 250 300 VCC- VOH1 [V] 1.6 1.4 VCC=3.3V 1.2 1 0.8 0.6 0.4 0.2 0 0 50 100 150 200 250 300 ISINK 1 [mA] ISOURCE 1 [mA] L-level output voltage (VOL2) vs. output sink current (Isink2) 2.4 2.2 2 1.8 H-level output voltage (VOH2) vs. output source current (ISOURCE2) 2.4 2.2 2 1.8 VOL2 [V] 1.4 VCC=3.3V 1.2 1 0.8 0.6 0.4 0.2 0 0 50 100 150 200 250 300 VCC- VOH2 [V] 1.6 1.6 1.4 VCC=3.3V 1.2 1 0.8 0.6 0.4 0.2 0 0 50 100 150 200 250 300 ISINK 2 [mA] ISOURCE 2 [mA] Error amplifier voltage gain (Av) / phase () vs. frequency (f) Condition: Open loop 180 160 140 120 100 Phase Av [dB] [deg] 80 60 40 Voltage gain 20 0 - 20 - 40 100 1K 10K 100K 1M 10M [HZ] 5 FA3630V s Application circuit Parts tolerances characteristics are not defined in the circuit design sample shown above. When designing an actual circuit for a product, you must determine parts tolerances and characteristics for safe and economical operation. 6 |
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