SC5205 150mA Ultra Low Dropout, Low Noise Micropower Linear Regulator POWER MANAGEMENT Description PRELIMINARY Features u u u u u u The SC5205 uses a Semtech proprietary internal PNP device for the pass element, providing a low dropout u voltage of 165mV at a load of 150mA, while maintaining u u a ground pin current of 2750µA. The SC5205 is a 150mA ultra low dropout linear regulator with a built in CMOS/TTL logic level enable switch. It is designed specifically for battery powered applications where low quiescent current and low dropout are critical for battery longevity. Ultra low dropout voltage - 165mV @ 150mA Guaranteed 150mA output current Low ground pin current at all loads <5µA quiescent current in shutdown Wide input supply voltage range 2.5V to 16V in Wide output voltage range Excellent line regulation Industrial temperature range Surface mount packaging (5 pin SOT-23) Applications The output noise is reduced by placing a 10nF capacitor on pin 4 (bypass). u u Each device contains a bandgap reference, error u amplifier, PNP pass element, thermal and current u limiting circuitry and resistor divider network for setting u output voltage. u The SC5205 is packaged in a 5 pin SOT-23 surface mount u package for a very small footprint and it requires only a u 1µF capacitor on the output and a 0.01µF on the bypass u Battery Powered Systems Cellular Telephones Cordless Telephones Pagers Personal Digital Assistants Portable Instrumentation Cameras Portable Consumer Equipment PCMCIA cards pin for a minimum amount of external components. Typical Application Circuit U1 SC5205 1 VIN 2 3 EN + VIN VO 5 VO GND EN BYP C1 1uF 4 + C2 10nF C3 1uF Notes: (1) CIN (C1) is needed if the device is far from the supplys filter capacitors, or for operation from a battery. A value of 1.0µF or greater should be used. CIN may be tantalum or aluminum electrolytic. (2) CO (C3) should be a 1µF or greater tantalum or aluminum electrolytic capacitor. Larger value capacitors will improve the overall transient response. (3) CBYP (C2 - required) should be placed as close as possible to pin 4 and ground. A 10nF ceramic capacitor is recommended. (4) EN may be tied to VIN if the shutdown feature is not required. Maximum EN voltage = VIN. Revision 1, January 2001 1 www.semtech.com SC5205 POWER MANAGEMENT Absolute Maximum Ratings Parameter PRELIMINARY Sy mbol Limits U nits Input Supply Voltage VIN -0.3 to +20 V Power D i ssi pati on PD Internally Li mi ted W Thermal Resi stance Juncti on to Ambi ent q JA 256 °C /W Thermal Resi stance Juncti on to C ase q JC 81 °C /W Operati ng Ambi ent Temperature Range TA -40 to +85 °C Operati ng Juncti on Temperature Range TJ -40 to +125 °C Storage Temperature Range TSTG -65 to +150 °C Lead Temperature (Solderi ng) 10 sec TLEAD 300 °C ESD Rati ng (Human Body Model) V ESD 2 kV Electrical Characteristics Unless specified: VIN = VO(NOM) + 1V, IO = 100µA, CBYP = 10nF, CO = 1µF, VENABLE ³ 1.8V. Values in bold apply over the full operating temperature range. Parameter Sy mbol Test C onditions Min Supply Voltage Range VIN 2.5 Output Voltage VO -1% Ty p VO -3% Output Voltage Temperature C oeffi ci ent Li ne Regulati on TC REG(LINE) Max U nits 16 V +1% V +3% 40 VIN = (VO(NOM) + 1V) to 16V 0.06 ppm/°C 0.12 %/V 0.15 Load Regulati on REG(LOAD) IO = 0.1mA to 150mA 0.001 0.004 %/mA 0.007 D ropout Voltage(1) VD IO = 100µA 5 10 mV 25 IO = 50mA 100 150 mV 200 IO = 100mA 140 200 mV 250 IO = 150mA 165 250 mV 300 ã 2001 Semtech Corp. 2 www.semtech.com SC5205 POWER MANAGEMENT Electrical Characteristics (Cont.) PRELIMINARY Unless specified: VIN = VO(NOM) + 1V, IO = 100µA, CBYP = 10nF, CO = 1µF, VENABLE ³ 1.8V. Values in bold apply over the full operating temperature range. Parameter Ground Pi n C urrent Sy mbol Test C onditions IGND IO = 100µA Min Ty p Max U nits 80 125 µA 150 IO = 50mA 600 1000 µA 1500 IO = 100mA 1600 2100 µA 2600 IO = 150mA 2750 3300 µA 4000 C urrent Li mi t(2) Ri pple Rejecti on Rati o VEN < 0.4V (shutdown) 0.01 5 µA ILIM VO > (VO(NOM) - 5%) 300 500 mA PSRR IO = 100µA, f = 100Hz 50 dB 0.05 %/W 210 nV Thermal Regulati on ∆VO PD RMS Output Noi se en Enable Input Voltage V EN IO = 50mA, C BYP = 10nF, C O = 2.2µF, BW = 10Hz to 99kHz Low = O/P OFF Hi gh = O/P ON Enable Input C urrent IEN Hz 0.4 V 1.8 VEN £ 0.4V -0.01 -1 µA VEN ³ 1.8V 5 10 µA 20 Notes: (1) Defined as the input to output differential at which the output voltage drops to 2% below the value measured at a differential of 1V. (2) As the load resistance further decreases, the SC5205 folds back the output current to approximately 150mA at VO = 0V. ã 2001 Semtech Corp. 3 www.semtech.com SC5205 POWER MANAGEMENT Pin Configuration PRELIMINARY Ordering Information Top View D ev ice SC 5205-X.XC SKTR(1)(2) P ackag e 5 pi n SOT-23 Notes: (1) Where -X.X denotes voltage options. Available voltages are: 1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 3.6V, 3.8V, 4.0V and 5.0V. (2) Only available in tape and reel packaging. A reel contains 3000 devices. SOT-23-5 Block Diagram Pin Descriptions Pin Pin N ame 1 VIN 2 GND 3 EN Acti ve hi gh enable i nput. C onnect to VIN i f not bei ng used. 4 BYP Reference bypass. C onnect a 10nF capaci tor (requi red) between thi s pi n and GND to reduce output noi se 5 VO Voltage output. ã 2001 Semtech Corp. Pin Function Supply voltage i nput. Ground. 4 www.semtech.com SC5205 POWER MANAGEMENT Outline Drawing - SOT-23-5 PRELIMINARY Land Pattern - SOT-23-5 Contact Information Semtech Corporation Power Management Products Division 652 Mitchell Rd., Newbury Park, CA 91320 Phone: (805)498-2111 FAX (805)498-3804 ã 2001 Semtech Corp. 5 www.semtech.com