TS1540 1A Low Dropout Voltage Regulator with Low Quiescent Current TO-252 Pin Definition: (DPAK) 1. Output 2. Ground 3. Input General Description TS1540 of high current LDOs has been developed for portable application where low quiescent current is an important requirement. The device features excellent line and load transient response which does not exceed 10% of nominal output value for full operating temperature range even during power ON cycle and short circuit removal. Internally trimmed, temperature compensated bandgap reference guarantees 2.5% accuracy for full range of input voltage, output current and temperature. Included on the chip are accurate current limit and thermal shutdown protection. Device stability is achieved with only two external low ESR ceramic capacitors. Features Ordering Information Very Low Ground Current (I = 1mA) GND Part No. Package Packing Excellent Line Regulation TS1540CPxx RO TO-252 2.5Kpcs / 13 Reel Excellent Load Regulation Note: Where xx denotes voltage option, available are 50= 5.0V Very Low transient Overshoot 33= 3.3V Stable with low ESR output Capacitor (ESR = 0m) 25= 2.5V Thermal Shutdown 18= 1.8V 15= 1.5V Current Limit Leave blank for adjustable version. Application Typical Application Circuit Disk Drive Circuits Desktop Computers Laptop, Notebook Computers Block Diagram Fixed Output Voltage Version V = V (1+R2/R1) + I R2 OUT REF adj Adjustable Output Voltage Version Note: 1. Use Low ESR Capacitors. 2. C should be placed as closed to V as possible IN IN 1/4 Version: A07 TS1540 1A Low Dropout Voltage Regulator with Low Quiescent Current Absolute Maximum Rating (Note 1) Parameter Symbol Limit Unit Input Supply Voltage V 15 V IN Recommend Operation Input Supply Voltage V (Opr. Typ.) 12 V IN Power Dissipation (Note 2) P Internal limited D o Thermal Resistance Junction to Ambient 105 C/W JA Operating Temperature Range T 0 ~ +125 OPER o C Junction Temperature Range T +150 J Storage Temperature Range T -65 ~ +150 STG o Lead Soldering Temperature (260 C) 5 S o Electrical Specification (Ta = 25 C, unless otherwise specified.) Parameter Conditions Min Typ Max Unit Reference Voltage V = 2.75, Io= 1A 1.225 1.25 1.275 V IN V = 3V ~ 12V, Io= 1A 1.470 1.5 1.530 V IN V = 3.3V ~ 12V, Io= 1A 1.764 1.8 1.836 V IN Output Voltage (Note 4) V = 4V ~ 12V, Io= 1A 2.450 2.5 2.550 V IN V = 4.8V ~ 12V, Io= 1A 3.235 3.3 3.366 V IN V = 6.5V ~ 12V, Io= 1A 4.900 5.0 5.100 V IN Line Regulation Vo+1.5V V 12V, Io= 10mA -- 2 15 mV IN V = V +1.5V IN OUT Load Regulation (Note 1,2) -- 30 40 mV Io= 10mA ~ 1.0A Dropout Voltage Io= 1A, V = 1% V -- 1.0 1.2 V OUT OUT Quiescent Current V = 5V -- 2.5 5 mA IN Adjustable Pin Current -- 90 -- uA Output Current Limit V - V = 3V -- 1.8 -- A IN OUT Temperature Stability Io=10mA, -- 0.5 -- % F= 120Hz, Io= 1A, C = 10uF, OUT Ripple Rejection -- 60 70 dB V = Vout+3V IN Note 1: See thermal regulation specification for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead = 1/18 from the package. Note 2: Line and load regulation are guaranteed up to the maximum power dissipation of 10W. Power dissipation is determined by the input / output voltage difference and the output current. Guaranteed maximum power dissipation will not be available over the full input / output voltage range. Note 3: Quiescent current is defined as the minimum output current required to maintain the regulation. Note 4: The Output Capacitor does not have a theoretical upper limit and increasing its value will increase stability C =100uF or more is typical for high current regulator design. OUT 2/4 Version: A07