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PDF RN5RYxx1 Data sheet ( Hoja de datos )
| Número de pieza | RN5RYxx1 | |
| Descripción | VFM STEP-UP DC/DC CONVERTER CONTROLLER | |
| Fabricantes | RICOH electronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RN5RYxx1 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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VFM STEP-UP DC/DC
CONVERTER CONTROLLER
www.DataSheet4U.com
RN5RYxx1 SERIES
NO. EA-030-0204
OUTLINE
The RN5RYxx1 Series are CMOS-based VFM Control ICs for step-up DC/DC converter with an external dri-
ver transistor featuring high output voltage accuracy and low supply current. Each of the RN5RYxx1 Series ICs
consists of a voltage reference unit, an error amplifier, an oscillator, a VFM control circuit and feed back resistors.
A low ripple, high efficiency step-up DC/DC converter can be composed of the RN5RYxx1 Series with only an
inductor, a diode, a capacitor, and a drive transistor.
Since the package for these ICs is SOT-23-5( Mini-mold)package, high density mounting of the ICs on boards
is possible.
FEATURES
• Low Supply Current ..................................................................................Typ. 3µA
• Low Standby Current ..................................................................................Typ. 0.6µA
• Low Temperature-Drift Coefficient of Output Voltage ...........................Typ. ±50ppm / ˚C
• High Accuracy Output Voltage ...................................................................±2.5%
• Low Oscillation Start-up Voltage ...............................................................Max. 0.8V
• Small Package .............................................................................................SOT-23-5(Mini-Mold)
APPLICATIONS
• Power source for battery-powered instruments.
• Power source for cameras, VCRs, camcorders, pagers, and other hand-held communication instruments.
BLOCK DIAGRAM
CE
5
EXT
3
OSC
Output
Buffer
–
+
Vref
VOUT
2
GND
1
1
1 page  
RN5RYxx1
wwwE.DLataEShCeetT4UR.coImCAL CHARACTERISTICS
• RN5RY301
Symbol
Item
Conditions
Min.
Typ.
Topt=25˚C
Max. Unit
VOUT
VIN
IDD1
IDD2
Istandby
fosc
Duty
Vstart
Output Voltage
VIN=1.5V,IOUT=10mA
2.925 3.000 3.075
Input Voltage
10
Supply Current 1
EXT No load, VOUT=3.15V, Test circuits1
35
Supply Current 2
EXT No load, VOUT=2.85V, Test circuits1
25 50
Standby Current
VOUT=1.5V, Test circuits2
0.6 1.5
Maximum Oscillator Frequency
VOUT=2.85V, Test circuits3
180
Oscillator Duty Cycle
VOUT=2.85V, EXT High side, Test circuits3 60
75
Oscillator Start -Up Voltage
EXT No load, Test circuits4
0.7 0.8
V
V
µA
µA
µA
kHZ
%
V
∆VOUT
∆Topt
Output Voltage
Temperature Coefficient
IOUT=10mA
– 30˚C≤Topt≤85˚C
±50 ppm/˚C
IEXTH
IEXTL
VCEH
VCEL
ICEH
ICEL
EXT “H” Output Current
EXT “L” Output Current
CE “H” Input Voltage
CE “L” Input Voltage
CE “H” Input Current
CE “L” Input Current
VOUT=2.85V, VEXT=GND, Test circuits5
VOUT=2.85V, VEXT=2.85V, Test circuits6 1.5
VOUT=2.85V, Test circuits4
1.5
VOUT=2.85V, Test circuits4
CE=3.0V, Test circuits7
CE=GND, Test circuits8
– 0.1
0.0
0.0
–1.5 mA
mA
V
0.25 V
0.1 µA
µA
5
5 Page 
www3.)DRataipSpheleet4VUo.cltoamge vs. Output Current
350
300
250
200
150
100
50
0
0
0.9V
RN5RY301
1.5V
1.0V
L=27µH
VIN=2.0V
0.8V
100 200 300 400
Output Current IOUT(mA)
500
RN5RY501
L=27µH
500
3.0V
400
2.0V
VIN=4.0V
300
200
100 1.0V
0.9V
0.8V
0
0 100 200 300 400 500 600 700
Output Current IOUT(mA)
RN5RYxx1
RN5RY401
L=27µH
400
2.0V
300
VIN=3.0V
200
1.0V
0.9V
100 0.8V
0
0 100 200 300 400 500 600
Output Current IOUT(mA)
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet RN5RYxx1.PDF ] | |
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