BD8312HFN_11 Datasheet, PDF (2/15 Pages) Rohm – Output 1.5A or Less High-efficiency Step-down Switching Regulator with Built-in Power MOSFET

BD8312HFN
Technical Note
●Electrical Characteristics
（Unless otherwise specified, Ta = 25 ℃, VCC = 7.4 V）
Parameter
Symbol
Target Value
Unit
Min
Typ
Max
Conditions
[Low voltage input malfunction preventing circuit]
Detection threshold voltage
VUV
-
2.9
3.2
V VREG monitor
Hysteresis range
ΔVUVhy
100
200
300
mV
[Oscillator]
Oscillation frequency
Fosc
1.38
1.5
1.62 MHz
[Regulator]
Output voltage
VREG
4.65
5.0
5.35
V
[Error AMP]
INV threshold voltage
VINV
0.99 1.00 1.01
V
Input bias current
IINV
-50
0
50
nA VCC=12.0V , VINV=6.0V
Soft-start time
Tss
3.2
5.3
7.4 msec
[PWM comparator]
LX Max Duty
Dmax
-
-
(※)100 %
[Output]
PMOS ON resistance
RONP
-
450
600
mΩ
NMOS ON resistance
RONN
-
300
420
mΩ
Leak current
Ileak
-1
0
1
µA
[STB]
STB pin
Operation
VSTBH
2.5
-
11
V
control voltage _No-operation
VSTBL
-0.3
-
0.3
V
STB pin pull-down resistance
250
400
700
kΩ
[Circuit current]
VCC pin
Standby current
PVCC pin
ISTB1
ISTB2
-
-
1
µA
-
-
1
µA
Circuit current at operation VCC
-
600
900
µA VINV=1.2V
Circuit current at operation PVCC
-
30
50
µA VINV=1.2V
(※1) 100% is MAX Duty as behavior of a PWM conparetor.
Using in region where High side PMOS is 100% on state when the same or less input voltage than output voltage is supplied as an application circuit
causes detection of SCP then DC/DC converter stops.
 Not designed to be resistant to radiation
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2011.04 - Rev.D