GM6355 300mA LOW NOISE CMOS LDO WITH ENABLE FUNCTION Description The GM6355 series is a low-dropout linear regulator. It is designed specifically for batteryoperated systems with the ground current as low as 50μA typical. This feature significantly extends the battery life. Low power consumption and high accuracy is achieved through CMOS and programmable fuse technologies. GM6355 offers adjustable output option with VREF = 0.9V as well fixed output voltages including from 0.9V to 6.0V with 0.1V increment. GM6355 consists of a high-precision voltage reference, an error correction circuit, and a current limited output driver. With good transient responses, output remains stable even during load changes. Maximum output current: 300mA Minimum output voltage as low as 0.9V High output voltage accuracy: ± 1.5% Low power consumption On chip thermal and short circuit protections Low dropout voltage – 300mV @ 300mA Minimum input voltage 2.0V With its high ripple rejection ratios, this series can be used with power supply noise. A 470pF capacitor from the bypass (BY) input to ground reduces noise presenting on the internal reference, which in turn significantly reduces output noise. If output noise is not a concern, this input may be left unconnected. However, to use larger capacitor values Cbp it will result in a longer time to rated output voltage when power is initially applied. GM6355 incorporates both over-temperature and over-current protection. SOT23-5 (300mW) packages is available. Application Battery operated systems Reference voltage sources Portable computers Instruments Portable cameras and video recorders Pagers Typical Application Circuits GM6355-Adj VIN 1 VOUT 5 VIN COUT = 1µF 2 Enable Enable EN 3 1 4 BP EN Shutdown COUT = 1µF 2 3 Shutdown R1 4 Adj R2 CBP Figure 1 Fixed output version VOUT = VREF (1+ R1/R2) 5 Figure 2. Adjustable output version Note: EN (Pin 3) maybe connected directly to VIN (Pin1) www.gammamicro.com.tw GM6355V2.04 GM6355-x.x 1 GM6355 300mA LOW NOISE CMOS LDO WITH ENABLE FUNCTION Marking Information and Pin Configurations (Top View) SOT25 OUT BYP/ADJ 5 4 KEVYW 1 2 3 IN GND EN KE: Device Code, Green Product V: Voltage Code (see next page) Y: Year W: Week code Week 1-26 : A – Z Week 27-52 : A - Z Week 53 : A Pin Descriptions Pin Number 1 IN 2 GND 3 EN 4 GM6355V2.04 5 2 Pin Name Pin Function Supply Input Ground Enable/Shutdown (Input): CMOS compatible input. Logic high = Enable; logic low or open = shutdown Fixed output BYP Reference Bypass: Connect external 470pF capacitor to GND to reduce output noise. May be left open. Adjustable output ADJ Adjust (Input): Adjustable regulator feedback input. Connect to resistor voltage divider OUT Regulator Output GM6355 300mA LOW NOISE CMOS LDO WITH ENABLE FUNCTION Ordering Information – Green Products Output Voltage Voltage Code Package Shipping Adj A SOT-25 3,000 Units/Tape and Reel GM6355-1.2ST25RG 1.2V C SOT-25 3,000 Units/Tape and Reel GM6355-2.5ST25RG 2.5V G SOT-25 3,000 Units/Tape and Reel GM6355-3.3ST25RG 3.3V K SOT-25 3,000 Units/Tape and Reel Ordering Number GM6355-AST25RG Absolute Maximum Ratings (Note 1) PARAMETER SYMBOL RATINGS UNITS Input Voltage VIN 8 V Enable Voltage VEN 8 V Junction Temperature TJ - 40 to 125 °C Storage Temperature Tstg - 65 to 150 °C 260 °C Lead Temperature (soldering, 5 sec) GM6355V2.04 . 3 GM6355 300mA LOW NOISE CMOS LDO WITH ENABLE FUNCTION Electrical Characteristics (VIN = VOUT + 1V, TA = 25˚C unless otherwise noted) Parameter Symbol Output Voltage Accuracy (Note 2) VO Condition IO = 1mA IO = 1mA to 300mA Line Regulation ΔVO/ΔVI IO = 1mA, 2V < VIN < 6V Load Regulation (Note 1) ΔVO/ΔIL 1mA ≤ IO < 300mA, COUT = 1μF Min 2.0V < VO < 2.8V 1.5V VO < 2.0V 1.5 -3 +2 -0.3 IO = 300mA VO < 1.5V Maximum Output Current Current Limit CL EN Exit Delay ENDelay EN Input High Bias Current EN Input Low Bias Current GM6355V2.04 VO > 0.96xVraging VEN = VIN IBL VEN = Gnd EN Input Threshold Low VTL VIN=2.5V to 5.5V EN Input Threshold High VTH VIN=2.5V to 5.5V Ground Pin Current IQ IO = 0mA to 300mA Quiescent Current IQS VEN = Gnd IO = 100mA, COUT = 2.2μF, f = 100Hz Note 1: Load regulation is measured using pulse techniques with duty cycle < 5%. Note 2: The nominal value of reference voltage for adjustable version is 0.9V % 0.3 %/V 0.5 1.5 % 300 500 450 650 900 1200 1300 1600 mV mA 1300 mA 600 μsec 100 -1 Unit 0.05 300 CBP=0μF, COUT=1μF IO=100mA IBH PSRR 4 IOMIN Max -1.5 VO > 2.8V Dropout Voltage Typ -0.3 nA μA 0.4V 1.6V V V 50 85 μA 0.01 1 μA 55 dB GM6355 300mA LOW NOISE CMOS LDO WITH ENABLE FUNCTION Package Outline Dimensions – SOT 25 2.9 ± 0.1 1.9 ± 0.05 0.13 0.95 ± 0.038 Pad Layout 0.028 0.7 0~0.1 1.5 ± 0.05 2.8 ± 0.1 0.039 1.0 0.094 2.4 0.65 ± 0.05 0.8 ± 0.05 0.037 0.95 5° 0.037 0.95 0.074 1.9 5° 1.10 ± 0.1 (Inches ) mm Unit:mm GM6355V2.04 0.35 ± 0.03 5 GM6355 300mA LOW NOISE CMOS LDO WITH ENABLE FUNCTION Ordering Number GM 6355 - 1.8 APM Gamma Micro Circuit Type ST25 R Output Voltage Package Type Shipping Type A = 1.8 2.5 3.3 5.0 ST25: SOT 25 R: Tape & Reel Adj = 1.8V = 2.5V = 3.3V = 5.0V G Blank:Pb-free G:Green Note: Pb-free products: ♦ RoHS compliant and compatible with the current require-ments of IPC/JEDEC J-STD-020. ♦ Suitable for use in SnPb or Pb-free soldering processes with 100% matte tin (Sn) plating. GM6355V2.04 Green products: 6 ♦ Lead-free (RoHS compliant) ♦ Halogen free(Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by weight)