TS650

TS650 Buck Switching Regulator Pin assignment: 1. Out 2. P.Gnd 3. CT 4. Gnd 5. FB 6. Vcc 7. Comp. 8. Enable Supply Voltage Range 3 V to 30V Output Driving Current 500mA Oscillator Frequency up to 100KHz General Description The TS650 is a monolithic buck switching regulator, it is consist of an voltage reference, error amplifier, current limited set by an external resistor, power forward modular controller and switching frequencies up to 100KHz are set by an external capacitor. Additionally, a chip enable feature is provided to power down reducing the supply current, and with a minimum number of external components, the TS650 offer a simple and cost effective solution. The TS650 is offered in SOP-8 package. Features Power forward control circuit Operating voltage form 3V to 30V Low standby current Current limit adjustable Output switch current up to 500mA Variable oscillator frequency up to 100KHz (max) Shut down control 1.25V voltage reference Output Pin Descriptions Name Output P.Gnd CT Gnd FB Vcc Comp. Enable PWM Output Power Ground Oscillator Control Ground Voltage Feedback Power Supply Feedback Compensation ON/OFF control Description Applications Charger xD-ROM, xDSL product DC to DC converter s Ordering Information Part No. TS650CS Operating Temp. -20 ~ +85 C o Package SOP-8 Block Diagram TS650 1-4 2003/12 rev. A Absolute Maximum Rating Supply Voltage Comparator Input Voltage Range Collector Output Voltage Collector to Emitter Voltage Output Switching Current Operating Junction Temperature Range Storage Temperature Range Lead Temperature 1.6mm(1/16”) from case for 10Sec. VCC VFB VC(SW) VCE(SW) ISW TJ TSTG TLEAD 30 - 0.3 ~ 30 30 30 500 -20 ~ +125 -65 ~ +150 260 V V V V mA o o o C C C Electrical Characteristics (VCC =5V, Ta =25 C; unless otherwise specified.) o Parameter Reference Comp. Connect to FB Output voltage change with temperature Line regulation Output switch (note1) Saturation Voltage DC current gain Collector off-state current Oscillator (OSC) Frequency Charge Current Discharge Current Discharge to Charge current ratio Current Limit Sense Voltage ON/OFF driver control ON driver voltage OFF driver voltage ON driver current Total device supply current Symbol Test Conditions Min 1.23 Typ 1.25 - 0.1 - 0.2 Max 1.27 1 1 5 Unit V % mV VREF RegLine Ta= -20 C ~ 25 C Ta= 25 oC ~ 85 oC VCC = 5V ~ 30V ISW =0.5A ISW =1A, Vce=0.5V Vce=30V CT = 1nF, Vpin5=0V VCC = 5V ~ 30V VCC = 5V ~ 30V Pin7 to Vcc IDISCHARGE = ICHARGE 250 4 VCC = 3V ~ 30V 24 o o VCE(SAT) HFE IC(OFF) FOSC ICHARGE IDISCHARGE IDISCHARGE / ICHARGE VIPK(SENSE) Von Voff Ion ICC 1.0 75 40 33 35 220 6.5 1.2 V -- 100 42 uA KHz uA uA -- 350 5 1 100 mV V V mA mA VCC = 5V ~ 30V, CT = 1nF, pin7=Vcc, pin5>Vth, pin2=Gnd, remaining pins open 3 5 -400 Input bias current IIB Vin=0V Note 1: Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature. nA TS650 2-4 2003/12 rev. A Typical Application Circuit Device R1 R2 R3 R4 R5 R6 R7 Remark: Value 5.6K, 1/8W 1K,1/8W 100ohm, 1/4W 100ohm, 1/4W 0.33ohm, 1W 300ohm, 1/2W 300ohm, 1/2W Device C1 C2 L1 D1 Q1 Value 470pF, 16V 470uF, 16V 180uH, 2A SK34A TSB1386CY * Output = 1.25V * (R1/R2 +1) = 1.25V * (5.6K/1K + 1) = 8.25V @ 3A * SK34A: Taiwan semiconductor, Schottky 3A/40V in SMA package * TSB1386CY: Taiwan semiconductor, PNP transistor 5A/20V in SOT-89 package TS650 3-4 2003/12 rev. A SOP-8 Mechanical Drawing A SOP-8 DIMENSION DIM MILLIMETERS MIN 4.80 3.80 1.35 0.35 0.40 MAX 5.00 4.00 1.75 0.49 1.25 INCHES MIN 0.189 0.150 0.054 0.014 0.016 MAX 0.196 0.157 0.068 0.019 0.049 16 9 B P A B C D F G K M F 1 8 G C D K M R 1.27 (typ) 0.10 0.25 0o 5.80 0.25 7o 6.20 0.50 0.05 (typ) 0.004 0.009 0o 0.229 0.010 7o 0.244 0.019 P R TS650 4-4 2003/12 rev. A