BD9329AEFJ_15 Datasheet, PDF (3/23 Pages) Rohm – Synchronous Buck Converter with Integrated FET

BD9329AEFJ
Absolute Maximum Ratings (Ta = 25°C)
Parameter
Symbol
Rating
Unit
Supply Voltage
VIN
20
V
Switch Voltage
VSW
Power Dissipation for HTSOP-J8
Pd
Package Thermal Resistance θja ^{(Note 2)}
θja
Package Thermal Resistance θjc ^{(Note 2)}
θjc
20
3.76 ^{(Note 1)}
29.27
3.75
V
W
°C/W
°C/W
Operating Temperature Range
Topr
-40 to +85
°C
Storage Temperature Range
Tstg
-55 to +150
°C
Maximum Junction Temperature
Tjmax
150
°C
BST Voltage
VBST
VSW+7
V
EN Voltage
VEN
20
V
All Other Pins
VOTH
20
V
(Note 1) Reduced by 30.08 mW/°C over 25°C (Mount on 4-layer 70.0mm x 70.0mm x 1.6mm board)
(Note 2) Mount on 4-layer 50mm x 30mm x 1.6mm application board
Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over
the absolute maximum ratings.
Recommended Operating Conditions (Ta= -40°C to +85°C)
Parameter
Supply Voltage
SW Voltage
Output Current
Output Voltage Range
Symbol
Min
VIN
4.2
VSW
-0.5
ISW3
-
VRANGE
0.9
Rating
Unit
Typ
Max
12
18
V
-
+18
V
-
3
A
-
VIN x 0.7 V
Electrical Characteristics (Unless otherwise specified VIN=12V Ta=25°C)
Parameter
Limit
Symbol
Min
Typ
Error Amplifier Block
FB Input Bias Current
Feedback Voltage1
Feedback Voltage2
SW Block – SW
IFB
VFB1
VFB2
-
0.886
0.882
0.02
0.900
0.900
Hi-Side FET ON-Resistance
Lo-Side FET ON-Resistance
RONH
RONL
-
0.15
-
0.13
Hi/Lo-Side FET Leak Current
ILEAKN
-
0
Switch Current Limit
Maximum Duty Cycle
General
ILIMIT3
3.5
-
MDUTY
-
90
Enable Sink Current
Enable Threshold Voltage
Under Voltage Lockout Threshold
Under Voltage Lockout Hysteresis
Soft Start Current
Soft Start Time
Operating Frequency
Circuit Current
Standby Current
IEN
VEN
VUVLO
VHYS
ISS
tSS
fOSC
ICC
IQUI
90
180
1.0
1.2
3.5
3.75
-
0.3
5
10
-
22
300
380
-
1.2
-
15
Max
2
0.914
0.918
-
-
10
-
-
270
1.4
4.0
-
15
-
460
3
27
Unit
Conditions
µA
V Voltage Follower
V Ta=-25°C to +85°C
Ω ISW= -0.8A
Ω ISW= 0.8A
µA
VIN= 18V,
VSW = 0V / 18V
A
% VFB= 0V
µA VEN= 12V
V
V VIN Rising
V
µA VSS= 0V
ms CSS= 0.1 µF
kHz
mA VFB= 1.5V, VEN= 12V
µA VEN= 0V
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TSZ22111・15・001
3/19
TSZ02201-0323AAJ00010-1-2
16.Feb.2015 Rev.003