IR3897 IRF [International Rectifier], IR3897 Datasheet
IR3897
Manufacturer Part Number
IR3897
Description
4A HIGHLY INTEGRATED SUPLRBUCK
Manufacturer
IRF [International Rectifier]
Datasheet
1.IR3897.pdf
(45 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
IR3897MTR1PBF
Manufacturer:
IR
Quantity:
560
Company:
Part Number:
IR3897MTRPBF
Manufacturer:
INFINEON
Quantity:
2 140
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: 4mm x 5mm PQFN
Lead‐free, Halogen‐free and RoHS Compliant
Figure 1: IR3897 Basic Application Circuit
external Vcc
hiccup mode over current protection
efficiency
margining capability
+/‐4A)
capability
1
AUGUST 08, 2012 |DATA SHEET | Rev 3.3
o
C < Tj < 125
Single‐Input Voltage, Synchronous Buck Regulator
* optional
o
C
*
*
- 1 -
4A Highly Integrated SupIRBuck
DESCRIPTION
The IR3897 SupIRBuck
integrated and highly efficient DC/DC regulator.
The onboard PWM controller and MOSFETs make
IR3897 a space‐efficient solution, providing accurate
power delivery.
IR3897 is a versatile regulator which offers
programmability of switching frequency and internal
current limit while operates in wide input and output
voltage range.
The switching frequency is programmable from 300kHz
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
97
95
93
91
89
87
85
83
81
79
77
75
73
0.4
Netcom Applications
Embedded Telecom Systems
Server Applications
Storage Applications
Distributed Point of Load Power Architectures
0.8
Figure 2:IR3897 Efficiency
1.2
1.6
Load Current (A)
TM
1.2Vout
12Vin,Internal bias,Frequency 600KHz
is an easy‐to‐use, fully
2
TM
2.4
3.3Vout
2.8
IR3897
3.2
PD‐97663
3.6
4