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PDF RT8258 Data sheet ( Hoja de datos )
| Número de pieza | RT8258 | |
| Descripción | 700kHz Step-Down Converter | |
| Fabricantes | Richtek | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT8258 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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RT8258
1.2A, 24V, 700kHz Step-Down Converter
General Description
The RT8258 is a high voltage buck converter that can support
the input voltage range from 4.5V to 24V and the output
current can be up to 1.2A. Current Mode operation provides
fast transient response and eases loop stabilization.
The chip also provides protection functions such as cycle-
by-cycle current limiting and thermal shutdown protection.
The RT8258 is available in a SOT-23-6 and TSOT-23-6
packages.
Ordering Information
RT8258
Package Type
E : SOT-23-6
J6 : TSOT-23-6
Note :
Lead Plating System
G : Green (Halogen Free and Pb Free)
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Features
z Wide Operating Input Voltage Range : 4.5V to 24V
z Adjustable Output Voltage Range : 0.8V to 15V
z 1.2A Output Current
z 0.3Ω Internal Power MOSFET Switch
z High Efficiency up to 92%
z 700kHz Fixed Switching Frequency
z Stable with Low ESR Output Ceramic Capacitors
z Thermal Shutdown
z Cycle-By-Cycle Over Current Protection
z RoHS Compliant and Halogen Free
Applications
z Distributed Power Systems
z Battery Charger
z Pre-Regulator for Linear Regulators
z WLEDDrivers
Pin Configurations
http://www.DataSheet4U.net/
(TOP VIEW)
PHASE VIN EN
654
23
BOOT GND FB
SOT-23-6/TSOT-23-6
Typical Application Circuit
4.5VVtINo 24V
CIN
10µF
5 VIN BOOT 1
RT8258
PHASE 6
Chip Enable
4 EN
GND
2
FB 3
CBOOT L
10nF 10µH
D1
B230A
VOUT
3.3V
R1
100k
R2
32.4k
COUT
22µF
DS8258-02 March 2011
www.richtek.com
1
datasheet pdf - http://www.DataSheet4U.net/
1 page  
Typical Operating Characteristics
100
90
80
70
60
50
40
30
20
10
0
0
Efficiency vs. Output Current
VIN = 12V
VIN = 24V
VOUT = 5V
0.2 0.4 0.6 0.8
1 1.2
Output Current (A)
RT8258
100
90
80
70
60
50
40
30
20
10
0
0
Efficiency vs. Output Current
VIN = 12V
VIN = 24V
VOUT = 3.3V
0.2 0.4 0.6 0.8 1 1.2
Load Current (A)
3.366
3.344
3.322
3.300
3.278
Output Voltage vs. Output Current
VIN = 24V
VIN = 12V
Output Voltage vs. Temperature
3.366
3.344
http://www.DataSheet4U.net/
3.322
3.300
3.278
VIN = 12V
VIN = 24V
3.256
3.234
0 0.2 0.4 0.6 0.8 1 1.2
Output Current (A)
3.256
3.234
-50
-25
0 25 50 75
Temperature (°C)
IOUT = 0A
100 125
Frequency vs. Temperature
750
700
650
600
550
-50
-25
VIN = 12V, VOUT = 3.3V, IOUT = 0A
0 25 50 75
Temperature (°C)
100 125
Quiescent Current vs. Temperature
600
575
550
525 VIN = 24V
500
VIN = 12V
475
450
425
400
-50
-25
VEN = 2V, VFB = 1V
0 25 50 75
Temperature (°C)
100 125
DS8258-02 March 2011
www.richtek.com
5
datasheet pdf - http://www.DataSheet4U.net/
5 Page 
Outline Dimension
D
CB
H
L
RT8258
b
A
e
A1
Symbol
A
A1
B
b
C
D
e
H
L
Dimensions In Millimeters
Min Max
0.889
1.295
0.000
0.152
1.397
1.803
0.250
0.560
2.591
2.997http://www.DataSheet4U.net/
2.692
3.099
0.838
1.041
0.080
0.254
0.300
0.610
Dimensions In Inches
Min Max
0.031
0.051
0.000
0.006
0.055
0.071
0.010
0.022
0.102
0.118
0.106
0.122
0.033
0.041
0.003
0.010
0.012
0.024
SOT-23-6 Surface Mount Package
DS8258-02 March 2011
www.richtek.com
11
datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet RT8258.PDF ] | |
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