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PDF RT9266B Data sheet ( Hoja de datos )
| Número de pieza | RT9266B | |
| Descripción | Step-Up DC/DC Converter | |
| Fabricantes | Richtek | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT9266B (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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RT9266B
Tiny Package, High Efficiency, Step-Up DC/DC Converter
General Description
The RT9266B is a compact, high efficiency, and low
voltage step-up DC/DC converter with an Adaptive
Current Mode PWM control loop, includes an error
amplifier, ramp generator, comparator, switch pass
element and driver in which providing a stable and high
efficient operation over a wide range of load currents. It
operates in stable waveforms without external
compensation.
The low start-up input voltage below 1V makes RT9266B
suitable for 1 to 4 battery cells applications with a 500mA
internal switch. The 550kHz high switching rate minimized
the size of external components. Besides, the 25μA low
quiescent current together with high efficiency maintains
long battery lifetime.
Ordering Information
RT9266B
Package Type
E : SOT-23-6
Lead Plating System
P : Pb Free
G : Green (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.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Features
z 1V Low Start-up Input Voltage at 1mA Load
z 25μA Quiescent (Switch-off) Supply Current
z Zero Shutdown Mode Supply Current
z 90% Efficiency
z 550kHz Switching Frequency at 3.3V VDD
z Providing Flexibility for Using Internal and External
Power Switches
z Small SOT-23-6 Package
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z PDA
z DSC
z LCD Panel
z RF-Tags
z MP3
z Portable Instrument
z Wireless Equipment
Pin Configurations
(TOP VIEW)
FB VDD LX
654
23
EN EXT GND
SOT-23-6
DS9266B-11 April 2011
www.richtek.com
1
1 page  
Typical Operating Characteristics
Efficiency vs. Output Current
95
90
VIN = 3V
VIN = 2.5V
85
VIN = 2V
VIN = 1.5V
80 VIN = 1V
75
70
65
VOUT = 3.3V, TA = 25°C
60
1 10 100
Output Current (mA)
1000
Output Voltage vs. Output Current
3.36
3.32
VIN = 3V
3.28
VIN = 2.5V
VIN = 2V
3.24
VIN = 1.5V
VIN = 1V
VOUT = 3.3V, TA = 25°C
3.2
1 10 100
Output Current (mA)
1000
Input Current vs. Input Voltage
350
300
250
200
150
100
50
VOUT = 3.3V @ no load
0
1 1.5 2
Input Voltage (V)
2.5
3
DS9266B-11 April 2011
RT9266B
Efficiency vs. Output Current
100
VIN = 4.5V
VIN = 4V
90 VIN = 3.5V
VIN = 3V
VIN = 2.5V
VIN = 2V
80 VIN = 1.5V
70
VOUT = 5V, TA = 25°C
60
1 10 100
Output Current ( mA)
1000
Output Voltage vs. Output Current
5.1
5.05
VIN = 4.5V
5 VIN = 4V
4.95
VIN = 3.5V
VIN = 1.5V
4.9
VIN = 3V
VIN = 2.5V
VIN = 2V
VOUT = 5V, TA = 25°C
4.85
1 10 100
Output Current (mA)
1000
Input Current vs. Input Voltage
800
700
600
500
400
300
200
100
VOUT = 5V @ no load
0
123
Input Voltage (V)
4
5
www.richtek.com
5
5 Page 
Switching Frequency vs. VDD Pin Voltage
700
600
500
400
300
200
100
0
VDD = EN
FB = GND
TA = 25°C
12345
VDD Pin Voltage (V)
6
RT9266B
DS9266B-11 April 2011
www.richtek.com
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet RT9266B.PDF ] | |
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