RS53205 REED | Alldatasheet

Document overview

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  • PDF pages: 5

Technical content

Features

  • Input voltage range VIN from 2.4 V to 5.5V
  • Constant on time (COT) Control for fast transient
  • DCM mode operation
  • 1% Vout accuracy
  • Output current up to 3A
  • Power good output
  • 4MHz switching frequency
  • Overcurrent and short circuit protection
  • Low Rcson: 26 mΩ for both high side and low side
  • Output discharge function
  • Small 1.2 x 0.8mm WLCSP package

Applications

  • Optical modules
  • Smart phones
  • Wearable electronics
  • Camera modules
  • Industrial IoT (smart sensors) / NB-IoT

Description

The RS53203/04/05 are a family of small size, high efficiency step-down converters optimized for high density application . The device can operate at switching frequency up to 4MHz to reduce the size of external components. The device employes PFM/PWM mode operation. At PFM/PWM mode, the device transits between PFM and PWM mode automatically to save power at light load condition. At forced PWM mode, the device operates at 4MHz switching frequency. With 4 selectable output voltage options, the device requires minimum number of external components for output voltage setting. The input voltage of RS53203/04/05 is from 2.4V to 5.5V. The output current is up to 3A. RS53203/04/05 are available in a 0.8mm x 1.2 mm, 6-pin WLCSP package. PART NUMBER PACKAGE BODY SIZE RS53203/04/05 WLCSP-6 0.8x1.2 mm Typical Application Circuit FB VOUT COUT 22uF SW L VIN GND PG RS53205 EN PG EN CIN 4.7uF

RS53203, RS53204, RS53205 DATASHEET Reed Semiconductor Corp. All rights reserved.

Ordering Information

Level Shipping Method Package Marking Current VFB RS53205AR WLCSP-6 0.8x1.2 mm Level-1 3000u Tape & Reel 205A 3A 0.6V RS53205BR WLCSP-6 0.8x1.2 mm Level-1 3000u Tape & Reel 205B 3A 1.2V RS53205CR WLCSP-6 0.8x1.2 mm Level-1 3000u Tape & Reel 205C 3A 1.8V RS53205DR WLCSP-6 0.8x1.2 mm Level-1 3000u Tape & Reel 205D 3A 2.5V RS53205ER WLCSP-6 0.8x1.2 mm Level-1 3000u Tape & Reel 205E 3A 3.3V RS53204AR WLCSP-6 0.8x1.2 mm Level-1 3000u Tape & Reel 204A 2A 0.6V RS53204BR WLCSP-6 0.8x1.2 mm Level-1 3000u Tape & Reel 204B 2A 1.2V RS53204CR WLCSP-6 0.8x1.2 mm Level-1 3000u Tape & Reel 204C 2A 1.8V RS53204DR WLCSP-6 0.8x1.2 mm Level-1 3000u Tape & Reel 204D 2A 2.5V RS53204ER WLCSP-6 0.8x1.2 mm Level-1 3000u Tape & Reel 204E 2A 3.3V RS53203AR WLCSP-6 0.8x1.2 mm Level-1 3000u Tape & Reel 203A 1A 0.6V RS53203BR WLCSP-6 0.8x1.2 mm Level-1 3000u Tape & Reel 203B 1A 1.2V RS53203CR WLCSP-6 0.8x1.2 mm Level-1 3000u Tape & Reel 203C 1A 1.8V RS53203DR WLCSP-6 0.8x1.2 mm Level-1 3000u Tape & Reel 203D 1A 2.5V RS53203ER WLCSP-6 0.8x1.2 mm Level-1 3000u Tape & Reel 203E 1A 3.3V

RS53203, RS53204, RS53205 DATASHEET Reed Semiconductor Corp. All rights reserved. Pin Description EN VIN PG SW FB GND A B C 1 2 WLCSP-6 (0.8x1.2 mm) NAME WCSP-6 Description VIN A2 Power supply input. Place a 4.7uF or larger value ceramic capacitor close to VIN pin. SW B2 Switch node of power stage, connect SW pin to inductor. GND C2 Ground pin. Connect this pin close to GND terminal of input and output capacitors. FB C1 Output sense pin for VOUT regulation. Connect this pin directly to the output capacitor with a short trace when used as VOUT pin. Connect this pin to VOUT with a resistor divider when used as FB pin. EN A1 High level to enable the device, and low level to turn the device off. This pin has an internal pulldown resistor. The pulldown resistor is disconnected when the device is enabled and the output voltage is regulated. The resistor is connected once a low level is detected on the pin. PG B1 Open drain power good indicator. Connect this pin to VIN or other pull up voltage with a pull up resistor (1k~100k)

RS53203, RS53204, RS53205 DATASHEET Reed Semiconductor Corp. All rights reserved. PACKAGE DIMENSION NOTE: ALL DIMENSIONS ARE IN MILLIMETERS. TOP VIEW BOTTOM VIEW SIDE VIEW SYMBOLS MIN NOM MAX A --- --- 0.50 A1 0.13 0.16 0.19 A2 0.250 0.275 0.300 A3 --- 0.025 --- D 1.17 1.19 1.21 E 0.75 0.77 0.79 0.21 0.23 0.25 e ex aaa bbb 0.05 0.15

0.40 TYP

0.80 TYP

Tol. of Form & Position

RS53203, RS53204, RS53205 DATASHEET Reed Semiconductor Corp. All rights reserved. RECOMMENDED LAND PATTERN Note: All dimensions are in millimeters