R1232D RICOH [RICOH electronics devices division], R1232D Datasheet - Page 5

• Manufacturer Part Number: R1232D
• Description: PWM STEP-DOWN DC/DC CONVERTER WITH SYNCHRONOUS RECTIFIER
• Manufacturer: RICOH [RICOH electronics devices division]

•
ELECTRICAL CHARACTERISTICS
∆V
R1232DxxxA/C
Istandby
Maxduty
Symbol
OUT
I
V
V
V
tstart
LX
I
V
R
R
tprot
I
V
fosc
V
LXleak
V
VOUT
UVLO1
UVLO2
V
TESTL
I
I
limit
DD
ONN
CEH
OUT
ONP
CE
CEL
/∆Topt
FB
IN
Operating Input Voltage
Feedback Voltage
Step-down Output Voltage
Temperature Coefficient
Oscillator Frequency
Supply Current
Standby Current
L
ON Resistance of Pch Transistor V
ON Resistance of Nch Transistor V
Oscillator Maximum Duty Cycle
Soft-start Time
Protection Delay Time
Lx Current Limit
UVLO Detector Threshold
UVLO Released Voltage
CE Input Current
V
CE "H" Input Voltage
CE "L" Input Voltage
TEST pin "L" Input Voltage
Step-down Output Voltage
X
OUT
Leakage Current
Leakage Current
Item
V
V
−40°C
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
IN
IN
IN
IN
CE
IN
LX
IN
IN
IN
IN
IN
IN
IN
IN
IN
OUT
IN
IN
IN
=V
=V
=V
=V
=5.5V,V
=5.0V, I
=5.0V, I
=V
=V
=V
=V
=V
=5.5V, V
=5.5V, V
=5.5V
=3.0V
=3.0V
=0V/5.5V
=V
=5.5V/0V
CE
CE
CE
CE
CE
CE
CE
CE
CE
OUT
< =
=5.0V, I
=5.0V, I
=V
=5.5V, V
=5.0V, at no load
=5.0V
=5.0V
=2.6V-> 1.5V
=1.5V-> 2.6V
Conditions
=0V, V
Topt
LX
LX
SET
CE
CE
CE
=200mA
=200mA
=0V
=5.5V/0V
+1.5V
=0V,
< =
OUT
OUT
IN
85°C
OUT
= 5.5V
=10mA
=10mA
=5.5V
×0.980
0.784
Min.
0.75
2.10
2.20
−5.0
−0.1
−0.1
100
2.6
0.5
0.1
1.0
1.5
70
V
0.800
+0.10
±150
Typ.
1.00
0.20
0.20
2.25
140
0.0
0.0
1.0
2.0
1.4
0.0
0.0
UVLO1
×1.020
0.816
Max.
1.25
0.35
0.35
10.0
2.40
2.50
190
5.5
5.0
5.0
1.4
0.1
0.1
0.3
0.3
R1232D
Topt=25°C
ppm/
MHz
Unit
ms
ms
µA
µA
µA
µA
µA
°C
%
Ω
Ω
V
V
V
A
V
V
V
V
V
5