L1803

DATASHEET SEARCH SITE | WWW.ALLDATASHEET.COM

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 6

Technical content

UNISONIC TECHNOLOGIES CO., LTD L1803 Preliminary LINEAR INTEGRATED CIRCUIT www.unisonic.com.tw 1 of 6 Copyright © 2017 Unisonic Technologies Co., Ltd QW-R102-058.d 1.5A ULTRA LOW DROPOUT LINEAR REGULATOR WITH PROGRAMMABLE SOFT-START  DESCRIPTION The UTC L1803 is a typical LDO that features a user-programmable soft-start, very low dropout voltage as low as 0.15V at output current 1.5A, an enable input and a power-good output. The soft-start reduces inrush cu rrent of the load capacitors and minimizes stress on the input power source during start-up. An enable pin to further reduce power dissipation while shutdown. And power-good output indicates the output voltage status. The UTC L1803 is stable with any type of output capacitor of 2.2µF or more. A precision refer ence and feedback control deliver 2% accuracy over load, line, and operating temperature ranges.  FEATURES * Low VIN and wide VIN range: 1.0V~5.5V * Bias voltage (VVCC) range: 2.7V~5.5V * Low VOUT range: 0.8V~3.3V * 150mV dropout @1.5A, VVCC=5V * 2% output Voltage * Power-Good (PG) output * Programmable soft-start provides linear voltage startup * Stable with any output capacitor≥2.2µF  ORDERING INFORMATION Ordering Number Lead Free Halogen Free Package Packing L1803L-SH2-R L1803G-SH2-R HSOP-8 Tape Reel L1803L-K10-3030-R L1803G-K10-3030-R DFN3030-10 Tape Reel

L1803 Preliminary LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 2 of 6 www.unisonic.com.tw Q W - R 1 0 2 - 0 5 8 . d  MARKING HSOP-8 DFN3030-10  PIN CONFIGURATION  PIN DESCRIPTION PIN NO. HSOP-8 DFN3030-10 PIN NAME DESCRIPTION 1 1, 2 IN The main power Input pin. 2 3 PG Power-good pin, open-drain output. 3 4 V CC Bias input pin of the control circuitry 4 5 EN Enable pin. 5 6 GND Ground. 6 7 SS Soft-start pin. 7 8 FB Feedback pin. 8 9 OUT Regulated output pin. - 10 NC NO Connection.

L1803 Preliminary LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 3 of 6 www.unisonic.com.tw Q W - R 1 0 2 - 0 5 8 . d  BLOCK DIAGRAM IN EN VCC PG OUT SS FB GND Gate Driver Current Limit 0.8V+ + 0.72V Thermal Shutdown

L1803 Preliminary LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 4 of 6 www.unisonic.com.tw Q W - R 1 0 2 - 0 5 8 . d  ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Input Voltage Range V IN, VVCC -0.3~+6 V Enable Voltage Range V EN -0.3~+6 V Power-Good Voltage Range V PG -0.3~+6 V Soft-Start Voltage Range V SS -0.3~+6 V Feedback Voltage Range V FB -0.3~+6 V Output Voltage Range V OUT -0.3~V IN +0.3 V Maximum Output Current I OUT Internally Limited Junction Temperature T J -40~+150 °C Storage Temperature T STG -65~+150 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.  RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL MIN TYP MAX UNIT Input Voltage (Note) V IN 1.0 5.5 V Bias Voltage V VCC 2.7 5.5 V Output Current I OUT 0 1.5 A Operating Ambient Temperature T A -40 85 °C Note: At VIN =1V, the maximum load currents may be lower than 1.5A.  THERMAL RESISTANCES CHARACTERISTICS PARAMETER SYMBOL RATINGS UNIT HSOP-8 150 °C/W Junction to Ambient DFN3030-10 θJA 72 (Note) °C/W Note: The PCB area is 4 times larger than that of IC’s  ELECTRICAL CHARACTERISTICS At VEN=1.1V, VIN=VOUT+0.5V, CVCC=0.1uF, CIN=COUT=10uF, IOUT=50mA, VVCC=5.0V, and TA=-40°C~+85°C, unless otherwise noted. Typical values are at TA=+25°C. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Input Voltage Range V IN V OUT+VDO 5.5 V Bias Pin Voltage Range (Note 2) V VCC 2.7 5.5 V Internal Reference (Adj.) V REF T A=+25°C 0.792 0.8 0.808 V Output Voltage Range V IN=5V, IOUT=1.5A 0.8 3.3 V Accuracy (Note 2) VOUT 3V≤VVCC≤5.5V, 50mA≤IOUT≤1.5A -2 ±0.5 2 % Line Regulation ∆VOUT / ∆VIN / VOUT VOUT (NOM)+0.5≤VIN, 5.5V 0.02 %/V Load Regulation ∆VOUT / VOUT / ∆IOUT 50mA≤IOUT≤1.5A 0.08 %/V IOUT=1.5A, VVCC-VOUT(NOM)≥3.25V 150 270 mV Dropout Voltage (Note 3) V DO IOUT=1.5A, VIN=VVCC 1.5 1.7 V Current Limit I CL V OUT=80%xVOUT (NOM) 2 3 4 A Short-Circuit Current I SHORT V OUT<0.2V 0.6 1.1 A Bias Pin Current I VCC 1 2 mA Shutdown Supply Current (IGND) I SHDN V EN≤0.4V 70 100 µA Feedback Pin Current I FB -1 0.1 1 µA

L1803 Preliminary LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 5 of 6 www.unisonic.com.tw Q W - R 1 0 2 - 0 5 8 . d  ELECTRICAL CHARACTERISTICS (Cont.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT 1KHz, IOUT=1A, VIN=1.8V, VOUT=1.5V 60 dB Power-Supply Rejection (VIN~VOUT) PSRR 300KHz, IOUT=1A, VIN=1.8V, VOUT=1.5V 30 dB 1KHz, IOUT=1A, VIN=1.8V, VOUT=1.5V 50 dB Power-Supply Rejection (VVCC~VOUT) 300KHz, IOUT=1A, VIN=1.8V, VOUT=1.5V 30 dB Startup Time T ST RLOAD for IOUT=1.0A, CSS =OPEN 100 µS Soft-Start Charging Current I SS V SS=0.4V 440 nA Enable Input High Level V EN, HI 1.1 5.5 V Enable Input Low Level V EN, LO 0 0.4 V Enable Pin Hysteresis V EN, HYS 50 mV Enable Pin Current I EN V EN=5V 0.1 1 µA PG Trip Threshold V PG, TH V OUT Decreasing 85 90 94 %V OUT PG Trip Hysteresis V PG, HYS 7 %V OUT PG Output Low Voltage V PG, LO IPG=1mA (Sinking), VOUT<VPG, TH 0.3 V PG Leakage Current I PG, LKG VPG=5.25V, V OUT>VPG, TH 0.1 1 µA Shutdown, Temperature Increasing +150 °C Thermal Shutdown Temperature T SD Reset, Temperature Decreasing +130 °C Notes: 1. VVCC should be higher or equal to VIN in this chip. 2. Tested at 0.8V; resistor tolerance is not taken into account. 3. Dropout is defined as the voltage from VIN to VOUT when VOUT is 3% below nominal.

Table 1. Capacitor Values for Programming the Soft-Start Time (Note) and reliable and may be changed without notice.