參數(shù)資料
型號(hào)： R1230D251A
廠(chǎng)商： Ricoh Co., Ltd.
英文描述： PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier
中文描述： 脈寬調(diào)制/ VFM的降壓型DC / DC同步整流轉(zhuǎn)換器
文件頁(yè)數(shù)： 5/20頁(yè)
文件大?。?/td> 881K
代理商： R1230D251A
Rev. 1.12 - 5 -
I
ELECTRICAL CHARACTERISTICS
G
R1230D**1A/B
Symbol
V
IN
V
OUT
(Topt=25
°
C)
Conditions
Item
MIN.
2.4
TYP.
×
0.980
TYP.
MAX. Unit
5.5
TYP.
×
1.020
Operating Input Voltage
Step-down Output Voltage
V
V
V
IN
=V
CE
=V
SET
+1.5V, V
MODE
=0V,
I
OUT
=10mA
-40
°
C
≤
Topt
≤
85
°
C
V
SET
V
OUT
/
T
fosc
fosc
I
DD
Step-down Output Voltage
Temperature Coefficient
Oscillator Frequency(xx1A)
Oscillator Frequency(xx1B)
Supply Current(xx1A)
±
150
ppm
/
°
C
kHz
kHz
μ
A
V
IN
=V
CE
=V
SET
+1.5V
V
IN
=V
CE
=V
SET
+1.5V
V
IN
=V
CE
=V
SET
+1.5V,
V
OUT
=V
MODE
=0V
V
IN
=V
CE
=V
SET
+1.5V,
V
OUT
=V
MODE
=0V
V
IN
=5.5V, V
CE
=V
OUT
=0V
V
IN
=5.0V
425
680
500
800
230
575
920
300
I
DD
Supply Current(xx1B)
250
350
μ
A
I
stb
R
ONP
Standby Current
ON Resistance of
Pch Transistor
ON Resistance of
Nch Transistor
0
5
μ
A
0.20
0.35
0.60
R
ONN
V
IN
=5.0V
0.20
0.45
0.70
I
LX
leak Lx Leakage Current
I
VOUT
V
OUT
Leakage Current
I
CE
CE Input Current
V
CEH
CE "H" Input Voltage
V
CEL
CE "L" Input Voltage
Maxdty
Oscillator Maximum Duty Cycle
V
LX
Lx Limit Voltage
V
IN
=5.5V, V
CE
=0V, V
LX
=0V/5.5V
V
IN
=5.5V, V
CE
=0V, V
LX
=0V/5.5V
V
IN
=5.5V, V
MODE
=0V, V
CE
=5.5V/0V
V
IN
=5.5V, V
OUT
=0V
V
IN
=2.4V, V
OUT
=0V
V
MODE
=0V
V
MODE
= V
OUT
=0V, V
IN
=V
CE
=3.0V
-0.1
-0.1
-0.1
1.5
0.0
0.0
0.0
0.1
0.1
0.1
μ
A
μ
A
μ
A
V
V
%
V
0.3
100
V
IN
-0.15 V
IN
-0.35
V
IN
-
0.55
2.5
2.5
2.2
2.3
0.1
T
start
T
prot
V
UVLO1
UVLO Threshold Voltage
V
UVLO2
UVLO Released Voltage
I
MODE
MODE Pin Input Current
V
MODEH
MODE ”H” Input Voltage
V
MODEL
MODE ”L” Input Voltage
VFMdty VFM Duty Cycle
Delay Time by Soft-Start function
at no load, V
IN
=V
CE
=V
SET
+1.5V
Delay Time for protection circuit
V
IN
=V
CE
=V
SET
+1.5V, V
MODE
=0V
V
IN
=V
CE
=2.5V->1.5V, V
OUT
=0V
V
IN
=V
CE
=1.5V->2.5V, V
OUT
=0V
V
IN
=5.5V, V
CE
=0V, V
MODE
=5.5V/0V
V
IN
=V
CE
=5.5V, V
OUT
=0V
V
IN
=V
CE
=2.4V, V
OUT
=0V
V
IN
=V
CE
= V
MODE
=2.4V, V
OUT
=0V
0.5
0.5
1.8
1.9
-0.1
1.5
1.5
1.5
2.1
2.2
ms
ms
V
V
μ
A
V
V
%
0.3
85
55
65
相關(guān)PDF資料
PDF描述
R1230D251A-TL PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier
R1230D251A-TR
R1230D251B
R1230D251B-TR
R1230D251C
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
R1230D251A-TL 制造商:RICOH 制造商全稱(chēng):RICOH electronics devices division 功能描述:PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier
R1230D251A-TR 制造商:RICOH 制造商全稱(chēng):RICOH electronics devices division 功能描述:PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier
R1230D251B 制造商:RICOH 制造商全稱(chēng):RICOH electronics devices division 功能描述:PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier
R1230D251B-TL 制造商:RICOH 制造商全稱(chēng):RICOH electronics devices division 功能描述:PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier
R1230D251B-TR 制造商:RICOH 制造商全稱(chēng):RICOH electronics devices division 功能描述:PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier
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