BD9673AEFJ Datasheet, PDF (4/23 Pages) Rohm – Flexible Step-down Switching Regulators with Built-in Power MOSFET

BD9673AEFJ
Datasheet
●Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
VCC-GND Supply Voltage
VCC
45
V
BST-GND Voltage
VBST
50
V
BST-Lx Voltage
⊿VBST
7
V
EN-GND Voltage
VEN
45
V
Lx-GND Voltage
VLX
45
V
FB-GND Voltage
VFB
7
V
VC-GND Voltage
VC
7
V
SYNC-GND Voltage
SYNC
7
V
High-side FET Drain Current
IDH
3.5
A
Power Dissipation
Pd
3.76^(*1)
W
Operating Temperature
Topr
-40～+105
℃
Storage Temperature
Tstg
-55～+150
℃
Junction Temperature
Tjmax
+150
℃
(*1)During mounting of 70×70×1.6t mm 4layer board (Copper area: 70mm×70mm).Reduce by 30.08mW for every 1℃ increase. (Above 25℃)
●Electrical Characteristics (Unless otherwise specified Ta=25℃, VCC=24V, Vo=5V,EN=3V )
Parameter
【Circuit Current】
Stand-by current of VCC
Symbol
Min.
Limits
Typ.
Unit
Max.
Conditions
Ist
－
0
10
µA VEN=0V
Circuit current of VCC
【Under Voltage Lock Out (UVLO)】
Detect Voltage
Icc
－
1
2
mA FB=1.2V
Vuv
6.1
6.4
6.7
V
Hysteresis width
【Oscillator】
Oscillating frequency
Vuvhy
－
200
300
mV
fosc
270
300
330
kHz
Max Duty Cycle
【Error Amp】
FB threshold voltage
Dmax
85
91
97
%
VFB
0.990 1.000 1.010
V
Input bias current
IFB
-1.0
0
1.0
µA VFB=0V
Error amplifier DC gain
A_VEA
700
Trans Conductance
G_EA
110
Soft Start Time
Tsoft
7
【Current Sense Amp】
VC to switch current transconductance
G_CS
5
【Output】
Lx NMOS ON resistance
RonH
－
7000
220
10
70000
440
13
V/V
µA/V
IVC=±10µA,
VC=1.5V
ms
10
20
A/V
200
340
mΩ
Lx pre-charge NMOS ON resistance
RonL
－
10
17
Ω
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
4/20
TSZ02201-0Q1Q0AJ00190-1-2
28.JAN.2014 Rev.003