BD35222EFV 반도체 회로 부품 판매점
Ultra Low Dropout Linear Regulators
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 ROHM Semiconductor |
TECHNICAL NOTE
High-performance Regulator IC Series for PCs
Ultra Low Dropout
Linear Regulators(4A) for Desktop PC
BD3522EFV, BD35221EFV, BD35222EFV
● Description
BD3522EFV / BD35221EFV / BD35222EFV ultra low-dropout linear chipset regulator operates from a very low input supply,
and offers ideal performance in low input voltage to low output voltage applications. It incorporates a built-in N-MOSFET
power transistor to minimize the input-to-output voltage differential to the ON resistance (RON=50mΩ) level. By lowering the
dropout voltage in this way, the regulator realizes high current output (Iomax=4.0A) with reduced conversion loss, and
thereby obviates the switching regulator and its power transistor, choke coil, and rectifier diode. Thus, BD3522EFV /
BD35221EFV / BD35222EFV designed to enable significant package profile downsizing and cost reduction. In BD3522EFV,
an external resistor allows the entire range of output voltage configurations between 0.65 and 2.7V, while the NRCS (soft
start) function enables a controlled output voltage ramp-up, which can be programmed to whatever power supply sequence
is required.
● Features
1) Internal high-precision reference voltage circuit(0.65V±1%)
2) Internal high-precision output voltage circuit <BD35221EFV/BD35222EFV>
3) Built-in VCC undervoltage lockout circuit (VCC=3.80V)
4) NRCS (soft start) function reduces the magnitude of in-rush current
5) Internal Nch MOSFET driver offers low ON resistance (28mΩ typ)
6) Built-in short circuit protection (SCP)
7) Built-in current limit circuit (4.0A min)
8) Built-in thermal shutdown (TSD) circuit
9) Variable output (0.65～2.7V) <BD3522EFV>
10) High-power package HTSSOP-B20 : 6.5mm x 6.4mm x 1.0mm
11) Tracking function
● Applications
Notebook computers, Desktop computers, LCD-TV, DVD, Digital appliances
● Line-up
Maximum Output Voltage
Adjustable (0.65～2.7V)
1.2V (fixed)
1.5V (fixed)
Package
HTSSOP-B20
Product name
BD3522EFV
BD35221EFV
BD35222EFV
Oct. 2008
●Absolute maximum ratings
Parameter
Input Voltage 1
Input Voltage 2
Maximum Output Current
Enable Input Voltage
Power Dissipation 1
Power Dissipation 2
Power Dissipation 3
Power Dissipation 4
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temperature
Symbol
VCC
VIN
IO
Ven
Pd1
Pd2
Pd3
Pd4
Topr
Tstg
Tjmax
BD3522EFV
Limit
BD35221EFV
6.0 *1
6.0 *1
4*1
6.0
1.00 *2
1.45 *3
2.31 *4
3.20 *5
-10～+100
-55～+125
+150
BD35222EFV
Unit
V
V
A
V
W
W
W
W
℃
℃
℃
*1 Should not exceed Pd.
*2 Reduced by 8mW/℃ for each increase in Ta≧25℃ (when mounted on a 70mm×70mm×1.6mm glass-epoxy board, no copper foil area)
*3 Reduced by 11.6mW/℃ for each increase in Ta≧25℃ (when mounted on a 70mm×70mm×1.6mm glass-epoxy board, 2-layer,
copper foil area : 15mm×15mm)
*4 Reduced by 18.5mW/℃ for each increase in Ta≧25℃ (when mounted on a 70mm×70mm×1.6mm glass-epoxy board, 2-layer,
copper foil area : 70mm×70mm)
*5 Reduced by 25.6mW/℃ for each increase in Ta≧25℃ (when mounted on a 70mm×70mm×1.6mm glass-epoxy board, 4-layer,
copper foil area : 70mm×70mm)
●Operating Voltage(Ta=25℃)
Parameter
Symbol
BD3522EFV
Min. Max.
Input Voltage 1
Input Voltage 2
VCC
VIN
4.3 5.5
0.7 VCC-1 *6
Output Voltage Setting Range Vo
VFB 2.7
Enable Input Voltage
Ven -0.3 5.5
NRCS Capacity
CNRCS 0.001
1
*6 VCC and VIN do not have to be implemented in the order listed.
★This product is not designed for use in radioactive environments.
BD35221EFV
Min. Max.
4.3 5.5
1.25 VCC-1 *6
1.2 (fixed)
-0.3 5.5
0.001
1
BD35222EFV
Min. Max.
4.3 5.5
1.55 VCC-1 *6
1.5 (fixed)
-0.3 5.5
0.001
1
Unit
V
V
V
V
μF
2/20
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제조업체: ROHM Semiconductor
( rohm )
BD35222EFV regulator
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[ BD35222EFV.PDF ]
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국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
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