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PDF XRP6124 Data sheet ( Hoja de datos )
| Número de pieza | XRP6124 | |
| Descripción | Non-Synchronous PFET Step-Down Controller | |
| Fabricantes | Exar | |
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January 2011
XRP6124
Non-Synchronous PFET Step-Down Controller
Rev. 1.1.0
GENERAL DESCRIPTION
The XRP6124 is a non synchronous step down
(buck) controller for up to 5Amps point of
loads. A wide 3V to 30V input voltage range
allows for single supply operations from
industry standard 3.3V, 5V, 12V and 24V
power rails.
With a proprietary Constant On-Time (COT)
control scheme, the XRP6124 provides
extremely fast line and load transient response
while the operating frequency remains nearly
constant. It requires no loop compensation
hence simplifying circuit implementation and
reducing overall component count. The
XRP76124 also implements an emulated ESR
circuitry allowing usage of ceramic output
capacitors and insuring stable operations
without the use of extra external components.
Built-in soft start prevents high inrush currents
while under voltage lock-out and output short
protections insure safe operations under
abnormal operating conditions.
The XRP6124 is available in a RoHS compliant,
green/halogen free space-saving 5-pin SOT23
package.
TYPICAL APPLICATION DIAGRAM
APPLICATIONS
• Point of Load Conversions
• Audio-Video Equipments
• Industrial and Medical Equipments
• Distributed Power Architecture
FEATURES
• 5A Point-of-Load Capable
− Down to 1.2V Output Voltage Conversion
• Wide Input Voltage Range
− 3V to 18V: XRP6124
− 4.5V to 30V: XRP6124HV
• Constant On-Time Operations
− Constant Frequency Operations
− No External Compensation
− Supports Ceramic Output Capacitors
• Built-in 2ms Soft Start
• Short Circuit Protection
• <1µA shutdown current
• RoHS Compliant, Green/Halogen Free
5-pin SOT23 Package
Figure 1: XRP6124 Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
1 page  
XRP6124
Non-Synchronous PFET Step-Down Controller
XRP6124ES0.5-F
Fig. 10: Line Regulation
Fig. 11: Line Regulation
VOUT
AC coupled
10mV/div
LX
10V/div
XRP6124ES0.5-F
IL
2A/div
1µs/div
Fig. 12: Steady state, VIN=12V, VOUT=3.3V, IOUT=3A
VOUT
AC coupled
20mV/div
LX
20V/div
XRP6124HVES0.5-F
IL
2A/div
2µs/div
Fig. 13: Steady state, VIN=24V, VOUT=5.0V, IOUT=3A
XRP6124ES0.5-F
VOUT
AC coupled
100mV/div
90mV
XRP6124HVES0.5-F
VOUT
AC coupled
200mV/div
180mV
IOUT
1A/div
10µs/div
Fig. 14: Load step transient response, 1.4A-3A-1.4A
IOUT
1A/div
20µs/div
Fig. 15: Load step transient response, 1.4A-3A-1.4A
© 2011 Exar Corporation
5/12
Rev. 1.1.0
5 Page 
PACKAGE SPECIFICATION
5-PIN SOT23
XRP6124
Non-Synchronous PFET Step-Down Controller
© 2011 Exar Corporation
11/12
Rev. 1.1.0
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet XRP6124.PDF ] | |
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