Distribution Spotlight

Distribution Spotlight
Innovations Embedded
Buck DC/DC Converters
ROHM’s BD9328EFJ and BD9329AEFJ synchronous
rectification step-down switching regulators integrate 2 low
resistance N-channel MOSFETs and feature high
current output over a wide input supply range. In addition,
current-mode operation provides fast transient response
along with easy phase compensation. An optimized design
reduces the number of external components required,
minimizing costs.
Applications
Key Features
• Printers
• LCD TVs
• Home appliances
• Distributed power systems
• Secondary power supplies
• BD/DVD players
• DSL/cable modems
• Set top boxes
• Wide input voltage range: 4.2V -18V
• High output current: 2A (BD9328EFJ) / 3A (BD9329AEFJ)
• High Side/Low Side ON resistance: 0.15/0.13Ω
• Supports low ESR ceramic capacitors
• Low standby current: 15uA (typ.)
• Operating frequency: 380kHz
• Feedback voltage: 0.9V ± 1.5% accuracy at room temperature
• Multiple protection circuits: UVLO, TSD, OCP
• Thermally enhanced HTSOP-J8 package
• Internal oscillator results in fewer external parts
• Soft start function prevents inrush current at startup
• Adjustable output voltage: 0.9V to Vin x 0.7V
Pricing
BD9328EFJ-E2: Min Quantity: 2500 LT:10 Price: $0.40
BD9329AEFJ-E2: Min Quantity: 2500 LT:10 Price: $0.46
Evaluation boards are available.
95
32
90
28
Efficiency[%]
IOC (uA)
24
20
18
12
70
65
60
4
55
4
6
8
10
12
VN (V)
14
Stand by current
(IC not active)
BD9328EFJ-E2
80
75
8
0
more info:
85
16
1
50
0
500
1000
1500
2000
2500
3000
Io[mA]
STEP Down Efficiency
(VIN= 12V VOUT=3.3V L=10μH)
visit us:
BD9329AEFJ-E2
www.rohm.com