SLPS674 June   2017 CSD95481RWJ

PRODUCTION DATA.  

  1. 1Features
  2. 2Applications
  3. 3Description
  4. 4Revision History
  5. 5Pin Configuration and Functions
  6. 6Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
  7. 7Application Schematic
  8. 8Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Community Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  9. 9Mechanical, Packaging, and Orderable Information
    1. 9.1 Mechanical Drawing
    2. 9.2 Recommended PCB Land Pattern
    3. 9.3 Recommended Stencil Opening

Package Options

Mechanical Data (Package|Pins)
  • RWJ|41
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5 Pin Configuration and Functions

Top View
CSD95481RWJ TopView_r2.gif

Pin Functions

PIN DESCRIPTION
NAME NO.
VOS 1 Output voltage sensing pin for the internal current sensing circuitry.
AGND 2 This pin is internally connected to PGND.
VDD 3 Supply voltage for internal circuitry. This pin should be bypassed directly to pin 2.
PVDD 4 Supply voltage for gate drivers. This pin should be bypassed to PGND.
PGND 5 Power ground.
NC 6 Not connected. This pin needs to be left floating in application.
PGND 7-9 Power ground.
VSW 10-19 Phase node connecting the HS MOSFET source and LS MOSFET drain – pin connection to the output inductor.
PGND 20-24 Power ground.
VIN 25-30 Input voltage pin. Connect input capacitors close to this pin.
NC 31 Not connected. This pin needs to be left floating in application.
BOOTR 32 Return path for HS gate driver. It is connected to VSW internally.
BOOT 33 Bootstrap capacitor connection. Connect a minimum 0.1-µF, 16-V, X5R ceramic capacitor from BOOT to BOOTR pins. The bootstrap capacitor provides the charge to turn on the control FET. The bootstrap diode is integrated.
PWM 34 Tri-state input from external controller. Logic low sets control FET gate low and sync FET gate high. Logic high sets control FET gate high and sync FET gate low. Both MOSFET gates are set low if PWM stays in Hi-Z for greater than the tri-state shutdown hold-off time (T3HT).
EN/FCCM 35 This dual function pin either enables the diode emulation function or can be used as a simple enable for the device. When this pin is driven into the tri-state window and held there for more than the tri-state hold-off time, Diode Emulation Mode is enabled for sync FET. When the pin is high, device operates in Forced Continuous Conduction Mode. When the pin is low, both FETs are held off. An internal resistor pulls this pin low if left floating.
TAO/FLT 36 Temperature amplifier output. Reports a voltage proportional to the IC temperature. An ORing diode is integrated in the IC. When used in multiphase application, a single wire can be used to connect the TAO pins of all the ICs. Only the highest temperature will be reported. TAO will be pulled up to 3.3 V if thermal shutdown LSOC or HSS detection circuit is tripped.
LSET 37 A resistor from this pin to PGND pin sets the inductor value for the internal current sensing circuitry.
IOUT 38 Output of current sensing amplifier. V(IOUT) – V(REFIN) is proportional to the phase current.
REFIN 39 External reference voltage input for current sensing amplifier.
PGND 40 Power ground.
NC 41 Not connected. This pin needs to be left floating in application.