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PDF MT3420 Data sheet ( Hoja de datos )
| Número de pieza | MT3420 | |
| Descripción | 2A Synchronous Step-Down Converter | |
| Fabricantes | Aerosemi Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MT3420 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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MT3420 Rev.V1.2
1.4MHz, 2A Synchronous Step-Down Converter
FEATURES
• High Efficiency: Up to 96%
• 1.4MHz Constant Frequency Operation
• 2A Output Current
• No Schottky Diode Required
• 2.5V to 5.5V Input Voltage Range
• Output Voltage as Low as 0.6V
• PFM Mode for High Efficiency in
Light Load
• 100% Duty Cycle in Dropout Operation
• Low Quiescent Current: 40µA
• Slope Compensated Current Mode
Control for Excellent Line and Load
Transient Response
• Short Circuit Protection
• Thermal Fault Protection
• Inrush Current Limit and Soft Start
• <1µA Shutdown Current
• TDFN33-10 package
APPLICATIONS
• Cellular and Smart Phones
• Wireless and DSL Modems
• PDAs
• Portable Instruments
• Digital Still and Video Cameras
• PC Cards
GENERAL DESCRIPTION
The MT3420 is a 1.4MHz constant
frequency, current mode step-down
converter. It is ideal for portable equipment
requiring very high current up to 2A from
single-cell Lithium-ion batteries while still
achieving over 90% efficiency during peak
load conditions. The MT3420 also can run at
100% duty cycle for low dropout operation,
extending battery life in portable systems
while light load operation provides very low
output ripple for noise sensitive applications.
The MT3420 can supply up to 2A output
load current from a 2.5V to 5.5V input
voltage and the output voltage can be
regulated as low as 0.6V. The high switching
frequency minimizes the size of external
components while keeping switching losses
low. The internal slope compensation setting
allows the device to operate with smaller
inductor values to optimize size and provide
efficient operation. The MT3420 is available
in adjustable (0.6V to VIN) output voltage
version. The device is available in a Pb-free,
3x3mm 10-lead TDFN package and is rated
over the -40°C to +85°C temperature range.
This device offers two operation modes,
PWM control and PFM Mode switching
control, which allows a high efficiency over
the wider range of the load.
MT3420 Datasheet V1.2 October 2011
1 Aerosemi Technology Co.,LTD
1 page  
MT3420 Rev.V1.2
Typical Performance Characteristics
95.00%
90.00%
85.00%
80.00%
75.00%
70.00%
100.00%
95.00%
90.00%
85.00%
80.00%
75.00%
70.00%
Vin=5V, Vout=1.8V
Vin=5V, Vout=3.3V
VOUT
10mV/DIV
Vin=3.6V
Vout=1.8V
Iout=50mA
SW
5V/DIV
IL
500mA/DIV
400ns/DIV
PFM MODE
MT3420 Datasheet V1.2 October 2011
5 Aerosemi Technology Co.,LTD
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MT3420.PDF ] | |
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