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PDF RT8075 Data sheet ( Hoja de datos )
| Número de pieza | RT8075 | |
| Descripción | 1.25MHz Synchronous Step-Down Converter | |
| Fabricantes | Richtek | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT8075 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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RT8075
Dual 1A, 1.25MHz Synchronous Step-Down Converter
General Description
The RT8075 is a high efficiency Pulse-Width-Modulated
(PWM) dual step-down DC/DC converter. Capable of
delivering up to 1A output current over a wide input voltage
range from 2.5V to 5.5V, the RT8075 is ideally suited for
portable electronic devices that are powered from 1-cell
Li-ion battery or from other power sources such as cellular
phones, PDAs, PC WLAN card and hand-held devices.
Three operating modes are available including : PWM
mode, Low Dropout Mode and shut-down mode. The
Internal synchronous rectifier with low RDS(ON) dramatically
reduces conduction loss at PWM mode. No external
Schottky diode is required in practical application. The
RT8075 enters Low Dropout mode when normal PWM
cannot provide regulated output voltage by continuously
turning on the upper P-MOSFET. The RT8075 enters shut-
down mode and consumes less than 0.1μA when the EN
pin is pulled low.
The switching ripple is easily smoothed-out by small
package filtering elements due to the fixed operating
frequency of 1.25MHz. The RT8075 is available in the
WDFN-10L 3x3 package.
Pin Configurations
(TOP VIEW)
EN1 1
FB1 2
VIN2 3
GND 4
LX2 5
10 LX1
9 GND
8 VIN1
7 FB2
11 EN2
WDFN-10L 3x3
Marking Information
RT8075GQW
38=YM
DNN
38= : Product Code
YMDNN : Date Code
Features
z 2.5V to 5.5V Input Range
z 1A Output Current
z 1.25MHz Fixed Frequency PWM Operation
z 95% Efficiency
z No Schottky Diode Required
z 0.6V Reference Allows Low Output Voltage
z Low Dropout Operation : 100% Duty Cycle
z Small 10-Lead WDFN Package
z RoHS Compliant and Halogen Free
Applications
z Portable Instruments
z Microprocessors and DSP Core Supplies
z Cellular Phones
z Wireless and DSL Modems
z PC Cards
Ordering Information
RT8075
Package Type
QW : WDFN-10L 3x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
Halogen Free and Pb free)
Note :
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.
RT8075ZQW
38 YM
DNN
38 : Product Code
YMDNN : Date Code
DS8075-04 April 2011
www.richtek.com
1
1 page  
Typical Operating Characteristics
100
90
80
70
60
50
40
30
20
10
0
0.001
Efficiency vs. Output Current
VIN = 2.5V
VIN = 3.3V
VIN = 5.5V
VOUT = 1.2V
0.01 0.1
Output Current (A)
1
Reference Voltage vs. Input Voltage
0.620
0.615
0.610
0.605
0.600
0.595
0.590
0.585
0.580
VOUT = 1.2V, IOUT = 0.1A
2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
1.50
1.45
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
-50
Frequency vs. Temperature
VIN = 3.3V, VOUT = 1.2V
-25 0 25 50 75 100 125
Temperature (°C)
DS8075-04 April 2011
RT8075
1.230
1.225
1.220
1.215
1.210
1.205
1.200
1.195
1.190
1.185
1.180
0
Output Voltage vs. Output Current
VIN = 3.3V
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Output Current (A)
Reference Voltage vs. Temperature
0.620
0.615
0.610
0.605
0.600
0.595
0.590
0.585
0.580
-50
-25
VIN = 2.5V, VOUT = 1.2V, IOUT = 0.1A
0 25 50 75
Temperature (°C)
100 125
2.1
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
-50
Current Limit vs. Temperature
VIN = 3.3V, VOUT = 1.2V
-25 0 25 50 75 100 125
Temperature (°C)
www.richtek.com
5
5 Page 
Outline Dimension
RT8075
D2
D
L
E E2
SEE DETAIL A
1
21
21
eb
DETAIL A
Pin #1 ID and Tie Bar Mark Options
A
A3
A1
Note : The configuration of the Pin #1 identifier is optional,
but must be located within the zone indicated.
Symbol
A
A1
A3
b
D
D2
E
E2
e
L
Dimensions In Millimeters
Min Max
0.700
0.800
0.000
0.050
0.175
0.250
0.180
0.300
2.950
3.050
2.300
2.650
2.950
3.050
1.500
1.750
0.500
0.350
0.450
Dimensions In Inches
Min Max
0.028
0.031
0.000
0.002
0.007
0.010
0.007
0.012
0.116
0.120
0.091
0.104
0.116
0.120
0.059
0.069
0.020
0.014
0.018
W-Type 10L DFN 3x3 Package
Richtek Technology Corporation
Headquarter
5F, No. 20, Taiyuen Street, Chupei City
Hsinchu, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
Richtek Technology Corporation
Taipei Office (Marketing)
5F, No. 95, Minchiuan Road, Hsintien City
Taipei County, Taiwan, R.O.C.
Tel: (8862)86672399 Fax: (8862)86672377
Email: [email protected]
Information that is provided by Richtek Technology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit
design, specification or other related things if necessary without notice at any time. No third party intellectual property infringement of the applications should be
guaranteed by users when integrating Richtek products into any application. No legal responsibility for any said applications is assumed by Richtek.
DS8075-04 April 2011
www.richtek.com
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet RT8075.PDF ] | |
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