RS31309 REED | Alldatasheet
Document overview
- Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
- PDF pages: 8
Technical content
Features
- RS31211 - 3.3V eFuse
- RS31212 - 5V eFuse
- RS31309 – 2.97V to 18V input
- RS31311 - 12V eFuse
- Integrated 34mΩ Pass MOSFET
- Adjustable 0.5A to 4A current limit
- Adjustable output slew rate
- Enable with adjustable input UVLO threshold
- Fixed over-voltage camp: 3.8V for RS31211, 5.7V for RS31212 and 13.7V for RS31311
- Built-on over temperature protection
- Small 2x2mm WSON package
- RoHS compliant and Green
Applications
- Hot-swap, hot-plug
- PCI and PCIe cards
- Adapter powered devices
- HDD and SSD drivers
Description
The RS31211/212/309/311 devices are active circuit protection devices with an integrated MOSFET used to limit current and voltage to safe levels during fault conditions. The current limit level can be set with a resistor between ILM and ground, and the typical current limit accuracy is ±7.5%. The device has over voltage protection feature which limits the output voltage to a fixed level when over voltage fault occurs. To limit the inrush current during device turn-on, the rising slew rate of output voltage can be set by a capacitor between dVdt and ground. The device also offers EN on/off control and input UVLO features. The device is available in WSON 8 pins, 2x2 mm package. Typical Application Circuit ILM VOUT COUT VIN EN RS31211 dv/dt GND Cdvdt VIN VOUT RLIM FLT Fault
RS31211, RS31212, RS31309, RS31311 DATASHEET Reed Semiconductor Corp. All rights reserved. Package Reference Top View (RS31211A/B, RS31212A/B, RS31309A/B, RS31311A/B) dV/dT EN/UVLO VIN VIN ILM GND OUT FLT GND Top View (RS31211D, RS31212D) dV/dT EN/UVLO VIN VIN ILM GND OUT QOD GND
RS31211, RS31212, RS31309, RS31311 DATASHEET Reed Semiconductor Corp. All rights reserved. Device Comparison Table Part Number Output OV Protection Enable QOD (Quick output Discharge) RS31211A 3.8V Latch Active high No RS31211B 3.8V Auto retry Active high No RS31211D 3.8V Auto retry Active high Yes RS31212A 5.7V Latch Active high No RS31212B 5.7V Auto retry Active high No RS31212D 5.7V Auto retry Active high Yes RS31309A No OV Latch Active high No RS31309B No OV Auto retry Active high No RS31311A 13.7V Latch Active high No RS31311B 13.7V Auto retry Active high No Order Information Part Number Package Size MSL Shipping Method Package Marking RS31211AR WSON-8 2x2 mm Level-2 3000u Tape & Reel 211A RS31211BR WSON-8 2x2 mm Level-2 3000u Tape & Reel 211B RS31211DR WSON-8 2x2 mm Level-2 3000u Tape & Reel 211D RS31212AR WSON-8 2x2 mm Level-2 3000u Tape & Reel 212A RS31212BR WSON-8 2x2 mm Level-2 3000u Tape & Reel 212B RS31212DR WSON-8 2x2 mm Level-2 3000u Tape & Reel 212D RS31309AR WSON-8 2x2 mm Level-2 3000u Tape & Reel 309A RS31309BR WSON-8 2x2 mm Level-2 3000u Tape & Reel 309B RS31311AR WSON-8 2x2 mm Level-2 3000u Tape & Reel 311A RS31311BR WSON-8 2x2 mm Level-2 3000u Tape & Reel 311B Top Marking RYWS PPPP LLL Line 1
- R: Prefix of Reed Semiconductor (R is replaced by E for engineering lot)
- Y: Year code
- W: Week code
- S: Assembly site code Line 2
- PPPP: Truncated part number. Example: 311A represents the full part number RS31311A Line 3
- LLL: Lot code
RS31211, RS31212, RS31309, RS31311 DATASHEET Reed Semiconductor Corp. All rights reserved. Pin Description No. NAME TYPE Description 1 dVdt O Connect a capacitor from this pin to GND to set output voltage rising slew rate during turn-on
2 EN/UVLO I
Active high enable. Pull high to enable the device, and pull low to disable the device. Connect the pin to a resistor divider from Vin to GND to set input UVLO threshold. Do not leave the pin floating. 3, 4 VIN I Input supply voltage
5 OUT O Output of the device
RS31211A/B, RS31212A/B, RS31309A/B, RS31311A/B: Open drain pin. Fault event indicator. Connect the pin to external voltage through pull-up resistor. QOD O RS31211D and RS31212D: Quick output discharge pin. Tie QOD pin to output directly or through external resistor
7 ILM O
Dual function pin to limit and monitor the output current. An external resistor from the pin to GND sets the output current limit. The pin voltage can be used to monitor the output current. Do not leave floating.
8 GND G The GND pad is used as device ground as well as thermal pad to
dissipate heat.
RS31211, RS31212, RS31309, RS31311 DATASHEET Reed Semiconductor Corp. All rights reserved. PACKAGE DIMENSION SIDE VIEW NOTE: 1. ALL DIMENSIONS ARE IN MILLIMETERS. 2. LEAD COPLANARITY SHALL BE 0.1 MILLIMETER MAX. 3. DRAWING IS NOT TO SCALE. TOP VIEW BOTTOM VIEW REF MIN NOM MAX A 0.750 0.800 A1 0.005 D 1.900 2.000 2.100 E 1.900 2.000 2.100 d1 0.800 0.900 1.000 e1 1.500 1.600 1.700 e d b
0.250 REF
1.500 REF
0.203 REF
0.500 BSC
0.300 BSC
RS31211, RS31212, RS31309, RS31311 DATASHEET Reed Semiconductor Corp. All rights reserved. RECOMMENDED LAND PATTERN Note: All the data is nominal
RS31211, RS31212, RS31309, RS31311 DATASHEET Reed Semiconductor Corp. All rights reserved. TAPE AND REEL INFORMATION PKG type (mm) Reel Diameter (mm) Reel Width W1(mm) A0(mm) B0(mm) K0(mm) P1(mm) W(mm) Quad Note: All the data is nominal A0 Pocket width B0 Pocket length K0 Pocket thickness W1 Reel Width W Inner width of the carrier tape P1 Pitch between pocket centers Pocket thickness W1 Reel Width W Inner width of the carrier tape P1 Pitch between pocket centers
RS31211, RS31212, RS31309, RS31311 DATASHEET Reed Semiconductor Corp. All rights reserved. PIZZA BOX DIMENSION PKG type (mm) Units/box Length(mm) Width(mm) Height(mm) 2x2 3000 205 200 25 Note: All the data is nominal