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Numéro de référence | EML3171 | ||
Description | Synchronous Step-Down DC-DC Converter | ||
Fabricant | Elite Semiconductor | ||
Logo | |||
ESMT
EML3171
2.0A, Synchronous Step-Down DC-DC Converter
General Description
EML3171 is a high efficiency, DC-DC synchronous
buck converter which provides 2.0A output loading
after output voltage reach preset voltage. EML3171
uses different modulation algorithms for various
loading conditions. Under heavy load, EML3171
regulates the output voltage using Pulse Width
Modulation (PWM). The PWM mode provides low
output voltage ripple and fixed frequency noise.
While in light load, it enters Power Skip Modulation
(PSM) automatically to ensure a highly efficient
operation at light load condition. Under very heavy
load condition or when the input voltage
approaches the output voltage, EML3171 enters low
dropout voltage operation under 100% duty cycle.
The internal generated 0.8V precision feedback
reference voltage is designed for low output voltage
request. Low Power-FET Ron synchronous switch
dramatically reduces conduction loss.
The EML3171 is available in an 8-pin, space-saving
TDFN-3x3 package.
Typical Application
Features
Wide Operating Voltage Ranges : 2.6V to 5.5V
2.0A Output Current
High efficiency Buck Power Converter
Auto-select PSM/PWM
LDO mode: duty cycle: 100%
Synchronous Power Switches Rectification, no
Schottky Diode Required
1.4MHz Switching Frequency
Internal Soft-Start
Current Limit Protection
Over Temperature Protection
Output Shorting Protect
Output Over Voltage Protection
Applications
Cellular telephone
Wireless and DSL Modems
Digital Still Cameras
Portable Products
MP3 Players
R
V = V × (1 + 1 )
OUT
FB
R
2
Fig. 1 EML3171 application circuit
Elite Semiconductor Memory Technology Inc.
Publication Date: Dec. 2013
Revision: 0.1
1/16
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Pages | Pages 16 | ||
Télécharger | [ EML3171 ] |
No | Description détaillée | Fabricant |
EML3170 | Synchronous Step-Down Regulator | Elite Semiconductor |
EML3171 | Synchronous Step-Down DC-DC Converter | EML3171-EliteSemiconductor.pdf |
EML3171 | Synchronous Step-Down DC-DC Converter | Elite Semiconductor |
EML3172 | Synchronous Step-Down DC-DC Converter | EML3172-EliteSemiconductor.pdf |
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