IR3894 IRF [International Rectifier], IR3894 Datasheet
IR3894
Manufacturer Part Number
IR3894
Description
12A HIGHLY INTERGRATED SUPLRBUCK
Manufacturer
IRF [International Rectifier]
Datasheet
1.IR3894.pdf
(43 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
IR3894MTRPBF
Manufacturer:
IR
Quantity:
12 000
FEATURES
BASIC APPLICATION
Single 5V to 21V application
Wide Input Voltage Range from 1.0V to 21V with
Output Voltage Range: 0.5V to 0.86* Vin
Enhanced Line/Load Regulation with Feed‐Forward
Programmable Switching Frequency up to 1.5MHz
Internal Digital Soft‐Start/Soft‐Stop
Enable input with Voltage Monitoring Capability
Thermally Compensated Current Limit with robust
Smart internal LDO to improve light load and full load
External Synchronization with Smooth Clocking
Enhanced Pre‐Bias Start‐Up
Precision Reference Voltage (0.5V+/‐0.5%) with
Vp for Tracking Applications ((Source/Sink Capability
Integrated MOSFET drivers and Bootstrap Diode
Thermal Shut Down
Programmable Power Good Output with tracking
Monotonic Start‐Up
Operating temp: ‐40
Small Size: 5mm x 6mm PQFN
Lead‐free, Halogen‐free and RoHS Compliant
Figure 1: IR3894 Basic Application Circuit
external Vcc
hiccup mode over current protection
efficiency
margining capability
+/‐12A)
capability
1
AUGUST 08, 2012 | DATA SHEET | Rev 3.1
o
C < Tj < 125
Single‐Input Voltage, Synchronous Buck Regulator
o
C
- 1 -`
12A Highly Integrated SupIRBuck
DESCRIPTION
The IR3894 SupIRBuck
integrated and highly efficient DC/DC regulator.
The onboard PWM controller and MOSFETs make
IR3894 a space‐efficient solution, providing accurate
power delivery.
IR3894 is a versatile regulator which offers
programmable switching frequency and the fixed
internal current limit
The switching frequency is programmable from 300 kHz
to 1.5MHz for an optimum solution.
It also features important protection functions, such as
Pre‐Bias startup, thermally compensated current limit
over voltage protection and thermal shutdown to give
required system level security in the event of fault
conditions.
APPLICATIONS
Netcom Applications
Embedded Telecom Systems
Server Applications
Storage Applications
Distributed Point of Load Power Architectures
Figure 2: IR3894 Efficiency
TM
is an easy‐to‐use, fully
IR3894
PD‐97745