SE5317 SEAWARD | Alldatasheet

Document overview

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Technical content

Features

¾ Very Low Dropout Voltage ¾ Guaranteed 300mA Output ¾ Typical accuracy within 2% ¾ 35uA Quiescent Current ¾ Over Temperature Protection (OTP) ¾ Over Current Protection (OCP) ¾ Power-Saving Shutdown Mode ¾ Space-Saving SOT-23-5 ¾ Adjustable Output Voltages ¾ Low Temperature Coefficient ¾ RoHS Compliant and 100% Lead (Pb)-Free

Description

SE5317 is a positive, linear regulator featuring a low quiescent current (35uA typ.) with low dropout voltage, making it ideal for battery powered applications. The space- saving SOT-23-5 package are attractive for "Pocket" and "Hand Held" applications. SE5317 has Over Temperature Protection (OTP), and Over Current Protection (OCP) to prevent possible device failures due to improper or worst case applications. SE5317 is stable with an output capacitor of 2.2μF or greater. Pin Configuration

Applications

¾ Instrumentation ¾ Portable Electronics ¾ Wireless Devices ¾ Cordless Phones ¾ PC Peripherals ¾ Battery Powered Widgets ¾ Electronic Scales Ordering/Marking Information Package Ordering Information Marking Information ADJ SE5317-LF Starting with 3, a bar on top of 3 is for production year 2011, and underlined 3 is for year 2012. The naming pattern continues with consecutive characters for later years. ”□” is for the week code. ( A-Z: 1-26, a-z: 27-52)The last character “L” is for Lead-free process. A dot on top right corner is for PIN1.

Preliminary and all contents are subject to change without prior notice. Absolute Maximum Rating Parameter Symbol Value Units Input Voltage V IN 7 V Enable Voltage V EN -0.3 to V IN V Output Voltage V OUT -0.3 to 4.6 V Power Dissipation P D Internally Limited Thermal Resistance, Junction-to-Ambient ΘJA 250 (SOT-23-5) °C/W Lead Temperature (Soldering, 5 sec.) 260 °C Junction Temperature T J -20 to +150 °C Storage Temperature T S -40 to +150 °C Recommended Operating Conditions Parameter Symbol Value Units Supply Input Voltage Range V IN 2.5~5.5 V Junction Temperature Range T J -20 to +125 °C Typical Application Vout= 1.2 (R1 +R2)/R2 ; C2 is option

Preliminary and all contents are subject to change without prior notice. Electrical Characteristic TA = 25℃, VIN=5V unless otherwise noted Parameter Symbol Test Condition Min Typ Max Units Input Voltage Range V IN Note 5.5 V Output Voltage V O I O=1mA -2 2 % Dropout Voltage V Dropout I O=300mA 2.0V<V O(NOM)<=2.8V 400 mV V O=VONOM -2.0% 2.8V<VO(NOM)<3.8V 300 Output Current I O VO>1.2V 300 mA Current Limit I LIM VO>1.2V 550 mA Quiescent Current I Q IO=0mA 35 50 uA Line Regulation REG lINE IO=5mA ; VIN=VO+1 to 5.5V 0.1 %/V Load Regulation REG LOAD IO=1mA to 300mA 0.2 % Over TemeratureShutdown OTS 150 ℃ Over Temerature Hysterisis OTH 30 ℃ VO Temperature TC 30 ppm/℃ Power Supply Rejection PSRR IO=50mA f=100Hz 70 dB f=1kHz 53 Output Voltage Noise eN f=10Hz to 100kHz Co=2.2uF uVrms ADJ Input Bias Current I ADJ 30 nA ADJ Reference Voltage V REF -2% 1.21 +2% V EN Input Threshold VEH VIN=2.7V to 6V 2.0 Vin V VEL VIN=2.7V to 6V 0 0.4 V EN Input Bias Current I EN VEN=VIN, VIN=2.7V to 6V 0.1 uA Shutdown Supply Current I SD VIN=5V, VO=0V, VEN<VEL 0.5 1 uA Shutdown Output Voltage V O,SD IO=35mA,VEN<VEL 0 0.1 V Note1:Vin(min)=Vout+Vdropout

Preliminary and all contents are subject to change without prior notice. Block Diagram

Preliminary and all contents are subject to change without prior notice. Enable The EN Pin is an enable control Pin, When The Enable pin pulled High, IC is enabled; when pulled low, the PMOS pass tran sistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is less than 1µA. This pin behaves much like an electronic switch. Detailed Description SE5317 is a CMOS regulator containing a PMOS pass transistor, voltage reference, error amplifier, over-current protection, thermal shutdown, and Power Good detection circuitry. The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal pro- tection circuits. During norma l operation, the error am- plifier compares the output voltage to an internal precision voltage reference. Over Temperature Protection (OTP) and Over Current Protection (OCP) circuits become active when the junction temperature exceeds 150 ℃, or the current exceeds 550mA, respectively. During OTP, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120℃. External Capacitors SE5317 is stable with an output capacitor to ground of 1.0µF or greater. Ceramic capacitors have the lowest ESR, and will offer the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the highest ESR, resulting in the poorest AC response. Unfortunately, large value ceramic capacitors are com- paratively expensive. One option is to parallel a 0.1µF ceramic capacitor with a 10µF Aluminum Electrolytic. The benefit is low ESR, high capacitance, and low over- all cost. A second capacitor is recommended between the input and ground to stabilize Vin. The input capacitor should be at least 0.1µF to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A "Quiet" ground termination is desirable. This can be achieved with a "Star" connection..

Preliminary and all contents are subject to change without prior notice. OUTLINE DRAWING SOT-23-5L B K A F D E C H J Customer Support Seaward Electronics Incorporated – China Section B, 2nd Floor, ShangDi Scientific Office Complex, #22 XinXi Road Haidian District, Beijing 100085, China Tel: 86-10-8289-5700/01/05 Fax: 86-10-8289-5706 Seaward Electronics Corporation – Taiwan 2F, #181, Sec. 3, Minquan East Rd, Taipei, Taiwan R.O.C Tel: 886-2-2712-0307 Fax: 886-2-2712-0191 Seaward Electronics Incorporated – North America 1512 Centre Pointe Dr. Milpitas, CA95035, USA Tel: 1-408-821-6600 Last Updated - 5/9/2012 DIMENSIONS DIM INCHES MM MIN MAX MIN MAX A 0.110 0.120 2.80 3.05 B 0.059 0.070 1.50 1.75 C 0.036 0.051 0.90 1.30 D 0.014 0.020 0.35 0.50 E - 0.037 - 0.95 F - 0.075 - 1.90 H - 0.006 - 0.15 J 0.0035 0.008 0.090 0.20 K 0.102 0.118 2.60 3.00