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PDF PT1202E23E-ADJ Data sheet ( Hoja de datos )
| Número de pieza | PT1202E23E-ADJ | |
| Descripción | 600mA Synchronous Step-Down DC-DC Converter | |
| Fabricantes | Powtech | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PT1202E23E-ADJ (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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PT1202
1.9MHz, 600mA Synchronous
Step-Down DC-DC Converter
GENERAL DESCRIPTION
The PT1202 is a high efficiency monolithic current
mode synchronous buck regulator with a constant
operation frequency. A main switch and a synchronous
switch are integrated in PT1202, the device has high
efficiency and no external Schottky diode needed.
Supply current is 300uA during operation and drops to
≤1μA in shutdown. The 2.5V to 5.5V input voltage
range makes the PT1202 ideally suited for single Li-Ion
battery-powered applications. 100% duty cycle
provides low dropout operation, extending battery life
in portable systems. Automatic skip cycle operation
mode at light loads provides very low output ripple for
noise sensitive applications. Internal 1.9MHz switching
frequency allowing the use of small surface mount
inductors and capacitors. Ultra low output voltages are
easily available with the 0.6V feedback reference
voltage.
The PT1202 is offered in a low profile SOT package
and is available in an adjustable version and fixed
output voltages versions from 0.6v to 1.8v.
ORDERING INFORMATION
FEATURES
High Efficiency: Up to 96%
Low Quiescent Current: 300μA
600mA Output Current
2.5V to 5.5V Input Voltage Range
1.9MHz Constant Frequency Operation
Internal integrated main switch and rectifier, no
Schottky Diode Required
Low Dropout Operation: 100% Duty Cycle
0.6V Reference Allows Low Output Voltages
Shutdown Mode Draws≤1μA Supply Current
Current Mode Operation for Excellent Line and
Load Transient Response
Over-temperature Protected
Low Profile SOT Package
RoHS compliant
APPLICATIONS
Cellular and Smart Phones
Personal Information Appliances
Microprocessors and DSP Core Supplies
Wireless and DSL Modems
Digital Still Cameras
MP3 Players and PDAs
Portable Instruments
PACKAGE
SOT23-5
TEMPERATURE
RANGE
-40 oC to 85 oC
ORDERING PART
NUMBER
PT1202E23E-ADJ
TYPICAL APPLICATION CIRCUIT
TRANSPORT
MEDIA
Tape and Reel
3000 units
MARKING
1202z
VIN
2.7~5.5V 4 VVIINN
2.2uH
3
SSWW
CIN
4.7uF
CER
PT11220022
1 RRUUNN OOUUTT//FFBB 5
GGNNDD
2
VOUT
COUT
10uF
CER
China Resources Powtech (Shanghai) Co., Ltd.
PT1202_DS_Rev EN 3.3
WWW.CRPOWTECH.COM
Page.1
1 page  
PT1202
1.9MHz, 600mA Synchronous
Step-Down DC-DC Converter
TYPICAL PERFORMANCE CHARACTERISTICS
(From Figure 1, TA=25℃ Unless Otherwise Specified)
Efficiency vs. Input Voltage
Efficiency vs. OutpuEtfficCieuncryrves nOtutput Current (mA)
0.95
Vout=1.2V
0.90
0.85
0.80
0.75
Vin=2.7V
Vin=4.2V
0.70
0.65
Vin=3.6V
0.60
0.55
Vin=2.7V
Vin=3.6V
Vin=4.2V
0.50
0.5
1
10 100
Output Current (mA)
700
Efficiency vs. OutEpffuicitenCcyuvrsrOeuntptut Current (mA)
0.95
Vout=1.5V
0.90
0.85
0.80
0.75
Vin=2.7V
Vin=4.2V
0.70
0.65
0.60
0.55
Vin=3.6V
Vin=2.7V
Vin=3.6V
Vin=4.2V
Efficiency vs. OutpEuffitciCenucyrvrseOnuttput Current (mA)
1.00
0.95 Vout=2.5V
Vin=2.7V
0.90
0.85
0.80
0.75
0.70
0.65
Vin=3.6V
Vin=4.2V
0.60
0.55
0.50
Vin=2.7V
Vin=3.6V
Vin=4.2V
0.50
0.5
1
10
Output Current (mA)
100
0.45
0.5 1
600
10
Output Current (mA)
100
600
Reference Voltage (V) vs. Temperature (℃)
Oscillator Frequency vs. VIN
0.00
0.00
China Resources Powtech (Shanghai) Co., Ltd.
PT1202_DS_Rev EN 3.3
WWW.CRPOWTECH.COM
Page.5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet PT1202E23E-ADJ.PDF ] | |
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