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PDF TD8208 Data sheet ( Hoja de datos )
| Número de pieza | TD8208 | |
| Descripción | High Efficiency 1MHz 2A Step Up Regulator | |
| Fabricantes | Techcode | |
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Techcode®
High Efficiency 1MHz, 2A Step Up Regulator
DATASHEET
TD8208
General Description
Features
TD8208 is a high efficiency, current-mode control Boost DC to
DC regulator with an integrated 120mΩ RDS(ON) N-channel
MOSFET. The fixed 1MHz switching frequency and internal
compensation reduce external component count and save
the PCB space. The build-in internal soft start circuitry
minimizes the inrush current at start-up.
Wide input range:2.5-6V
1MHz switching frequency
Minimum on time: 100ns typical
Minimum off time: 100ns typical
Max output voltage: 6V
Low RDS(0N): 120mΩ
RoHS Compliant and Halogen Free
Compact package: SOT23-6
Applications
Cell Phone and Smart Phone
PDA, PMP, MP3
Digital Camera
Package Types
SOT23-6
Figure 1. Package Types of TD8208
October, 20, 2011.
Techcode Semiconductor Limited
1
www.techcodesemi.com
1 page  
Techcode®
High Efficiency 1MHz, 2A Step Up Regulator
Electrical Characteristics
DATASHEET
TD8208
(VIN = 3.3V, VOUT=5V, IOUT=100mA, TA = 25°C unless otherwise specified)
Parameters
Input Voltage Range
Quiescent Current
Low Side Main FET
Main FET Current
Switching Frequency
Feedback Reference
IN UVLO Rising
Thermal Shutdown
Symbol
VIN
IQ
Rds(on)
ILIM1
Fsw
VREF
VIN,UVLO
TSD
Test Condition
VFB=0.66V
Min.
2.5
3
0.8
0.588
Typ.
200
120
1
0.6
150
Max.
6
1.2
0.612
1.9
Unit
V
µA
mΩ
A
MHz
V
V
°C
October, 20, 2011.
Techcode Semiconductor Limited
5
www.techcodesemi.com
5 Page 
Techcode®
High Efficiency 1MHz, 2A Step Up Regulator
DATASHEET
TD8208
The schottky diode reverse breakdown voltage should
be larger than the output voltage.
Layout Design:
The layout design of TD8208 regulator is relatively
simple. For the best efficiency and minimum noise
problems, we should place the following components
close to the IC: CIN, L, R1 and R2.
1) It is desirable to maximize the PCB copper area
connecting to GND pin to achieve the best thermal and
noise performance. If the board space allowed, a
ground plane is highly desirable.
2) CIN must be close to Pins IN and GND. The loop
area formed by CIN and GND must be minimized.
3) The PCB copper area associated with LX pin must
be minimized to avoid the potential noise problem.
4) The components R1 and R2, and the trace
connecting to the FB pin must NOT be adjacent to the
LX net on the PCB layout to avoid the noise problem.
5) If the system chip interfacing with the EN pin has a
high impedance state at shutdown mode and the IN pin
is connected directly to a power source such as a Li-Ion
battery, it is desirable to add a pull down 1Mohm
resistor between the EN and GND pins to prevent the
noise from falsely turning on the regulator at shutdown
mode.
October, 20, 2011.
Techcode Semiconductor Limited
11
www.techcodesemi.com
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet TD8208.PDF ] | |
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