RSM3203 REED | Alldatasheet

Document overview

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  • PDF pages: 4

Technical content

Features

  • Input voltage range VIN from 2.4 V to 5.5 V
  • Constant on time (COT) Control for fast transient
  • PFM/PWM mode or forced PWM mode operation
  • 1% Vout accuracy
  • Output current up to 3A
  • Power good output
  • 4MHz switching frequency
  • Overcurrent and short circuit protection
  • Output discharge function
  • Small size 2.0 x 2.5 x 1.1 mm LGA package

Applications

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

Description

The RSM3203/04/05 are a family of small size, high efficiency step -down power module optimized for high density application. The device can operate at switching frequency up to 4MHz to reduce the size of external components. The device has trim option of PFM/PWM mode or forced PWM mode. 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 via trim, the device requires a minimum number of external components for output voltage setting. The input voltage of RSM3203/04/05 is from 2.4V to 5.5V. The output current is up to 3A. RSM3203/04/05 are available in a 2.0mm x 2.5 mm, 10-pin LGA package. PART NUMBER PACKAGE BODY SIZE RSM3203/04/05 LGA-10 2.0 x 2.5 mm Typical Application Circuit FB VOUT COUT 22uF VOUT VIN GND PG RSM3205 EN PG EN CIN 4.7uF

RSM3203, RSM3204, RSM3205 DATASHEET Reed Semiconductor Corp. All rights reserved. Device Comparison Table Part Number Current Rating VFB MODE RSM3203AR 1A 0.6V PFM/PWM RSM3203BR 1A 1.2V PFM/PWM RSM3203CR 1A 1.8V PFM/PWM RSM3203DR 1A 2.5V PFM/PWM RSM3203ER 1A 3.3V PFM/PWM RSM3203FR 1A 0.6V Forced PWM RSM3204AR 2A 0.6V PFM/PWM RSM3204BR 2A 1.2V PFM/PWM RSM3204CR 2A 1.8V PFM/PWM RSM3204DR 2A 2.5V PFM/PWM RSM3204ER 2A 3.3V PFM/PWM RSM3204FR 2A 0.6V Forced PWM RSM3205AR 3A 0.6V PFM/PWM RSM3205FR 3A 0.6V Forced PWM Order Information Part Number Package Size MSL Shipping Method Package Marking RSM3203AR LGA-10 2.0x2.5 mm Level-3 3000u Tape & Reel TBD RSM3203BR LGA-10 2.0x2.5 mm Level-3 3000u Tape & Reel TBD RSM3203CR LGA-10 2.0x2.5 mm Level-3 3000u Tape & Reel TBD RSM3203DR LGA-10 2.0x2.5 mm Level-3 3000u Tape & Reel TBD RSM3203ER LGA-10 2.0x2.5 mm Level-3 3000u Tape & Reel TBD RSM3203FR LGA-10 2.0x2.5 mm Level-3 3000u Tape & Reel TBD RSM3204AR LGA-10 2.0x2.5 mm Level-3 3000u Tape & Reel TBD RSM3204BR LGA-10 2.0x2.5 mm Level-3 3000u Tape & Reel TBD RSM3204CR LGA-10 2.0x2.5 mm Level-3 3000u Tape & Reel TBD RSM3204DR LGA-10 2.0x2.5 mm Level-3 3000u Tape & Reel TBD RSM3204ER LGA-10 2.0x2.5 mm Level-3 3000u Tape & Reel TBD RSM3204FR LGA-10 2.0x2.5 mm Level-3 3000u Tape & Reel TBD RSM3205AR LGA-10 2.0x2.5 mm Level-3 3000u Tape & Reel TBD RSM3205FR LGA-10 2.0x2.5 mm Level-3 3000u Tape & Reel TBD

RSM3203, RSM3204, RSM3205 DATASHEET Reed Semiconductor Corp. All rights reserved. Pin Description Top View VIN 1 VIN EN PG VOUT VOUT VOUT FB GND GND LGA-10 (2.0 mmx2.5 mm) NAME Pin Number Description VIN 1, 2 Power supply input. Place a 4.7uF or larger value ceramic capacitor close to VIN pin. VOUT 5, 6, 7 Output voltage pin. GND 9, 10 Ground pin. Connect this pin close to GND terminal of input and output capacitors. FB 8 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 3 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 4 Open drain power good indicator. Connect this pin to VIN or other pull up voltage with a pull up resistor (1k~100k)

RSM3203, RSM3204, RSM3205 DATASHEET Reed Semiconductor Corp. All rights reserved. Package Dimension