UD05158

UD05158 UTC | Alldatasheet

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UNISONIC TECHNOLOGIES CO., LTD UD05158 LINEAR INTEGRATED CIRCUIT www.unisonic.com.tw 1 of 5 Copyright © 2017 Unisonic Technologies Co., Ltd QW-R115-019.b 1.5A, LOW NIOSE 1.5MHZ SYNCHRONOUS STEP-DOWN CONVERTER  DESCRIPTION The UTC UD05158 is a high-frequency, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to achieve a 1.5A continuous output current over from 2.7V to 5.5V input supply range, with excellent load and line regulation. The output voltage is adjustable fr om 0.6V to the input voltage. During shutdown, the input is disconnected from the output and the shutdown current is less than 1uA . Other key features include over-temperature and short circuit protection, and under-voltage lockout to prevent deep battery discharge. The UTC UD05158 at 1.5A maximum output current while consuming only 200 μA of no-load quiescent current. Ultra-low RDS(ON) integrated MOSFET s and 100% duty cycle operation make the UTC UD05158 an ideal choice for high-output voltage, high-current applications which require a low dropout threshold.  APPLICATIONS * Cellular and Smart Phones * Microprocessors and DSP Core Supplies * Set Top Box * USB Dongle * Digital Still and Video Cameras * Portable Navigation Device  FEATURES * Output Current : Up to 1.5A * Output Voltage : 0.6V to VIN * Input Voltage : 2.7V to 5.5V * Low-RDS(ON) Internal Power MOSFETs. * High-Efficiency Synchronous-Mode Operation, up to 95% * 200uA (typ.) No Load Quiescent Current * Shutdown Current < 1µA * 100% Duty Cycle Operation * Fixed 1.5MHz Switching Frequency. * Current Mode Operation * Internal Soft-Start. * Current Limit Protection * Over-temperature Protection. * Input Under Voltage Lockout (UVLO)

UD05158 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 2 of 5 www.unisonic.com.tw Q W - R 1 1 5 - 0 1 9 . b  ORDERING INFORMATION Ordering Number Lead Free Halogen Free Package Packing UD05158L-K06-2020-R UD05158G-K06-2020-R DFN2020-6 Tape Reel  MARKING D158 Date Code

UD05158 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 3 of 5 www.unisonic.com.tw Q W - R 1 1 5 - 0 1 9 . b  PIN CONFIGURATION  PIN DESCRIPTION PIN NO. PIN NAME DESCRIPTION 1 NC No Internal Connection (Floating or Connecting to GND). 2 EN On/Off Control Input. Pull EN above 1.5V to turn the device on. 3 V IN Power Supply Input. Drive 2.5V to 5.5V voltage to this pin to power on this chip. Connecting a 10uF ceramic bypass capacitor between VIN and GND to eliminate noise 4 SW Switch Output. Connect this pin to the switching end of the inductor. 5 GND Ground. This pin is the voltage reference for the regulated output voltage. For this reason care must be taken in its layout. 6 FB Feedback Input. Connect FB to the center point of the external resistor divider. The feedback threshold voltage is 0.6V.  BLOCK DIAGRAM

UD05158 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 4 of 5 www.unisonic.com.tw Q W - R 1 1 5 - 0 1 9 . b  ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply Input Voltage V IN 6.0 V SW Pin Voltage VSW V IN+0.3 V EN Pin Voltage VEN 6.0 V Power Dissipation P D 0.7 W Junction Temperature T J +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 RATINGS UNIT Supply Input Voltage V IN 2.7 ~ 5.5 V Output Voltage VOUT 0.6 ~ V IN V Operating Junction Temperature T J -40 ~ +125 °C Operating Ambient Temperature T A -40 ~ +85 °C  THERMAL RESISTANCE S CHARACTERISTICS PARAMETER SYMBOL RATINGS UNIT Junction To Ambient θJA 120 °C/W Junction to Case θJC 22 °C/W  ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Input Voltage Range V IN 2.7 5.5 V Shutdown Current I SHDN V EN = 0V 0.1 1 µA HS Switch-On Resistance (Note 1, 2) HS RDS-ON ISW = 0.2A , VIN =3.6V 280 m Ω LS Switch-On Resistance (Note 1, 2) LS RDS-ON I SW = 0.2A , VIN =3.6V 250 m Ω HS Switch Current Limit (Note 1, 2) I LIMIT(HS) 1.4 1.5 A Oscillation frequency F SW V IN =3.6V , IOUT=100mA 1.2 1.5 1.8 MHz Feedback Voltage V FB T A = 25°C 0.588 0.6 0.612 V EN Rising Threshold V EN_RISING 1.5 V EN Falling Threshold V EN_FALLING 0.4 V EN Input Current I EN V IN = VEN = 0V. -1.0 1.0 uA VIN UVLO Threshold-Rising V UVLO-H V IN Rising 2.6 V VIN UVLO Threshold Hysteresis V UVLO-HYS 0.2 V Soft-Start Period T SS 1.5 mS Thermal Shutdown (Note 1) T SD 160 °C Notes: 1. Guaranteed by design. 2. Not tested in production and guaranteed by over-temperature correlation.

UD05158 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 5 of 5 www.unisonic.com.tw Q W - R 1 1 5 - 0 1 9 . b  TYPICAL APPLICATION CIRCUIT UTC assumes no responsibility for equipment failures that result from u sing products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition rang es, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or s ystems where malfunction of these products can be reasonably expected to result in personal injury. R eproduction in whole or in part is prohibited without the prior written consent of the copyright owner. T he information presented in this document does not form part of any quotation or contract, is believe d to be accurate and reliable and may be changed without notice.