ꢀ ELECTRICAL CHARACTERISTICS
ꢀR1230D**1A/B
(Topt=25°C)
Symbol
Item
Conditions
+1.5V, V
MIN.
2.4
TYP.×
0.980
TYP.
MAX. Unit
V
IN
Operating Input Voltage
Step-down Output Voltage
5.5
V
V
V
OUT
V =V =V
=0V,
V
SET
IN
CE
SET
MODE
TYP.×
1.020
I
=10mA
OUT
Step-down Output Voltage
Temperature Coefficient
ppm
/°C
∆V
/
-40°C ≤ Topt ≤ 85°C
±150
OUT
∆T
fosc
fosc
Oscillator Frequency(xx1A) V =V =V
+1.5V
+1.5V
+1.5V,
425
680
500
800
230
575 kHz
920 kHz
IN
CE
SET
SET
SET
Oscillator Frequency(xx1B) V =V =V
IN
CE
I
Supply Current(xx1A)
V =V =V
300
DD
IN
CE
µA
V
OUT
=V
=0V
MODE
I
Supply Current(xx1B)
V =V =V
+1.5V,
250
350
DD
IN
CE
SET
µA
V
OUT
=V
=0V
MODE
I
Standby Current
ON Resistance of
Pch Transistor
ON Resistance of
Nch Transistor
V =5.5V, V =V =0V
OUT
V =5.0V
IN
0
0.35
5
0.60
stb
IN
CE
µA
Ω
R
0.20
0.20
ONP
R
V =5.0V
IN
0.45
0.70
ONN
Ω
I leak Lx Leakage Current
V =5.5V, V =0V, V =0V/5.5V
-0.1
-0.1
-0.1
1.5
0.0
0.0
0.0
0.1
0.1
0.1
LX
IN
CE
LX
µA
µA
µA
V
V
%
V
I
V
OUT
Leakage Current
V =5.5V, V =0V, V =0V/5.5V
VOUT
IN
CE
LX
I
CE Input Current
V =5.5V, V
=0V, V =5.5V/0V
CE
IN
MODE
CE
V
V
CE "H" Input Voltage
CE "L" Input Voltage
V =5.5V, V =0V
OUT
CEH
IN
V =2.4V, V =0V
OUT
0.3
CEL
IN
Oscillator Maximum Duty Cycle
Maxdty
V
V
=0V
100
MODE
V
LX
Lx Limit Voltage
= V
=0V, V =V =3.0V
V -0.15 V -0.35 V -
IN
MODE
OUT
IN
CE
IN
IN
0.55
2.5
2.5
2.2
2.3
0.1
Delay Time by Soft-Start function
Delay Time for protection circuit
UVLO Threshold Voltage
UVLO Released Voltage
MODE Pin Input Current
MODE ”H” Input Voltage
MODE ”L” Input Voltage
T
T
at no load, V =V =V
+1.5V
0.5
1.5
ms
ms
V
V
µA
V
start
IN
CE
SET
V =V =V
+1.5V, V =0V
MODE
0.5
1.8
1.9
-0.1
1.5
1.5
2.1
2.2
prot
IN
CE
SET
V
V
I
V =V =2.5V->1.5V, V
=0V
UVLO1
UVLO2
MODE
IN
CE
OUT
V =V =1.5V->2.5V, V
=0V
IN
CE
OUT
V =5.5V, V =0V, V
=5.5V/0V
IN
CE
MODE
V
V =V =5.5V, V
=0V
=0V
MODEH
IN
CE
OUT
V
V =V =2.4V, V
0.3
85
V
%
MODEL
IN
CE
OUT
VFMdty VFM Duty Cycle
V =V = V
=2.4V, V =0V
OUT
55
65
IN
CE
MODE
Rev. 1.12
- 5 -
RICOH [ RICOH ELECTRONICS DEVICES DIVISION ]
