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BD35221EFV 데이터시트 PDF




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부품번호 BD35221EFV 기능
기능 Ultra Low Dropout Linear Regulators
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BD35221EFV 데이터시트, 핀배열, 회로
Datasheet
1.25V to VCC-1V, 4A 1ch
Ultra Low Dropout Linear Regulator
BD35221EFV
General Description
BD35221EFV is an ultra low-dropout linear chipset
regulator that operates from a very low input supply, It
offers ideal performance in low input voltage to low
output voltage applications. The input-to-output voltage
difference is minimized by using a built-in N-Channel
power MOSFET with a maximum ON-Resistance of
RON =50mΩ(Max). By lowering the dropout voltage, the
regulator achieves high output current of up to
(IOUTMAX=4.0A), thereby, reducing conversion loss,
making it comparable to a switching regulator and its
power transistor, choke coil, and rectifier diode
constituents. It is a low-cost design and is available in
significantly downsized package profiles.
Key Specifications
IN Input Voltage Range:
VCC Input Voltage Range:
Output Voltage Setting Range:
Output Current:
ON-Resistance:
Standby Current:
Operating Temperature Range:
1.25V to VCC-1V
4.3V to 5.5V
1.2V (fixed)
4.0A (Max)
28mΩ(Typ)
0µA (Typ)
-10°C to +100°C
Package
W(Typ) x D(Typ) x H(Max)
Features
Internal High-Precision Output Voltage Circuit
(1.20V±1%)
Built-in VCC Undervoltage Lockout Circuit
(VCC=3.80V)
NRCS (Soft start) Function Reduces the Magnitude
of In-rush Current
Internal N-Channel MOSFET Driver Offers low
ON-Resistance
Built-in Short Circuit Protection (SCP)
Built-in Current Limit Circuit (4.0A min)
Built-in Thermal Shutdown (TSD) Circuit
Tracking Function
Typical Application Circuit and Block Diagram
VCC
HTSSOP-B20
6.50mm x 6.40mm x 1.00mm
Applications
Notebook computers, Desktop computers, LCD-TV,
DVD, Digital appliances
VCC
11
EN
12
Reference
Block
NRCS x 0.3
VREF x 0.4
FB
SCP
13
CSCP
TSD
NRCS
8
CNRCS EN/UVLO
C1
VREF
UVLO2
VIN
UVLO LATCH
VCC
EN
UVLO1
UVLO1
CL
VCC VREF
X 0.7
Current
Limit
VCC
NRCS
SCP/TSD LATCH
LATCH
EN
UVLO1
CL
UVLO1
UVLO2
TSD
SCP
EN
NRCS
VD
14
R2
R1
R2
R1
IN
15
16
17
18
19
20
OUT
1
2
3
4
5
6
VOS
FB
7
IN
C2
OUT
CFB
C3
9 10
GND
Product structureSilicon monolithic integrated circuit
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product has no designed protection against radioactive rays
1/22
TSZ02201-0J2J0A601020-1-2
02.Nov.2015 Rev.001




BD35221EFV pdf, 반도체, 판매, 대치품
BD35221EFV
Recommended Operating Conditions (Ta=25°C)
Parameter
Symbol
Ratings
Min Max
Input Voltage 1
Input Voltage 2
VCC 4.3 5.5
VIN
1.25
VCC-1 (Note 6)
Output Voltage Setting Range VOUT
1.2 (fixed)
Enable Input Voltage
VEN -0.3 +5.5
NRCS Capacitance
CNRCS
0.001
1
(Note 6) VCC and IN do not have to be implemented in the order listed.
Unit
V
V
V
V
µF
Electrical Characteristics
(Unless otherwise specified, Ta=25°C, VCC=5V, VEN=3V, VIN=1.7V)
Parameter
Symbol
Min
Limit
Typ
Max
Bias Current
VCC Shutdown Mode Current
Output Current
Feedback Voltage 1
Feedback Voltage 2
Line Regulation 1
ICC
IST
IOUT
VVOS1
VVOS2
REG.l1
-
-
4.0
1.188
1.176
-
1.4
0
-
1.200
1.200
0.1
2.2
10
-
1.212
1.224
0.5
Line Regulation 2
Load Regulation
REG.l2
REG.L
-
-
0.1 0.5
0.5 10
Output ON-Resistance
RON
-
28 50
Standby Discharge Current
IDEN
1
-
-
[ENABLE]
Enable Pin
Input Voltage High
Enable Pin
Input Voltage Low
Enable Input Bias Current
VENHIGH
VENLOW
IEN
2
-0.2
-
--
- +0.8
6 10
[NRCS]
NRCS Charge Current
NRCS Standby Voltage
INRCS
12
20
28
VSTB
-
0 50
[UVLO]
VCC Undervoltage Lockout
Threshold Voltage
VCC Undervoltage Lockout
Hysteresis Voltage
VD Undervoltage Lockout
Threshold Voltage
[SCP]
SCP Start up Voltage
SCP Threshold Voltage
Charge Current
Standby Voltage
VCCUVLO
3.5
3.8
4.1
VCCHYS
100
160
220
VDUVLO VOUT x 0.6 VOUT x 0.7 VOUT x 0.8
VOUTSCP VOUT x 0.3 VOUT x 0.4 VOUT x 0.5
VSCPTH
1.05
1.15
1.25
ISCP
2
4
6
VSCPSTBY
-
- 50
Unit
mA
µA
A
V
V
%/V
%/V
mV
mA
V
V
µA
µA
mV
V
mV
V
V
V
µA
mV
Conditions
VEN=0V
Tj=-10°C to +100°C
VCC=4.3V to 5.5V
VIN=1.25V to 3.3V
IOUT=0A to 4A
IOUT=4A,VIN=1.2V
Tj=-10°C to +100°C
VEN=0V, VOUT=1V
VEN=3V
VEN=0V
VCC: Sweep-up
VCC: Sweep-down
VD: Sweep-up
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
4/22
TSZ02201-0J2J0A601020-1-2
02.Nov.2015 Rev.001

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BD35221EFV 전자부품, 판매, 대치품
BD35221EFV
Typical Waveforms continued
VCC
5V/div
VEN
2V/div
VIN
2V/div
VOUT
1V/div
VCC to VIN to VEN
Figure 9. Input Sequence
VCC
5V/div
VEN
2V/div
VIN
2V/div
VOUT
1V/div
VIN to VCC to VEN
Figure 10. Input Sequence
VCC
5V/div
VEN
2V/div
VIN
2V/div
VOUT
1V/div
VEN to VCC to VIN
Figure 11. Input Sequence
VCC
5V/div
VEN
2V/div
VIN
2V/div
VOUT
1V/div
VCC to VEN to VIN
Figure 12. Input Sequence
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
7/22
TSZ02201-0J2J0A601020-1-2
02.Nov.2015 Rev.001

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BD35221EFV

Ultra Low Dropout Linear Regulators

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