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PDF BD3522EFV Data sheet ( Hoja de datos )
| Número de pieza | BD3522EFV | |
| Descripción | Ultra Low Dropout Linear Regulator | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
0. 7V to VCC-1V, 4A 1ch
Ultra Low Dropout Linear Regulator
BD3522EFV
General Description
BD3522EFV 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. BD3522EFV is a low-cost design and is
available in significantly downsized package profiles. The
external resistor allows the entire range of output voltage
configurations between 0.65V and 2.7V, while the NRCS
(soft start) function enables a controlled output voltage
ramp-up, which can be programmed to a required power
supply sequence.
Key Specifications
IN Input Voltage Range:
VCC Input Voltage Range:
Output voltage range:
Output Current:
ON-Resistance:
Standby Current:
Operating Temperature Range:
0.7V to VCC-1V
4.3V to 5.5V
0.65V to 2.7V
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 Reference Voltage Circuit
(0.65V±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
HTSSOP-B20
6.50mm x 6.40mm x 1.00mm
Applications
Notebook computers, Desktop computers, LCD-TV,
DVD, Digital appliances
Typical Application Circuit and Block Diagram
VCC
VCC
11
EN
12
Reference
Block
NRCS×0.3
VREF×0.4
FB
SCP
13
CSCP
TSD
C1
VREF
UVLO2
VIN
UVLOLATCH
VCC
EN
UVLO1
UVLO1
CL
VCC
Current
Limit
VCC
NRCS
SCP/TSD LATCH
LATCH
EN
UVLO1
CL
UVLO1
UVLO2
TSD
SCP
EN
NRCS
8
CNRCS EN/UVLO
NRCS
VD
14
VREF
×0.7
IN
15
16
17
18
19
20
OUT
1
2
3
4
5
6
7
FB
IN
R2
C2
R1
OUT
R2 CFB
C3
R1
9 10
GND
○Product structure：Silicon monolithic integrated circuit
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product has no designed protection against radioactive rays
1/23
TSZ02201-0J2J0A601000-1-2
02.Nov.2015 Rev.001
1 page  
BD3522EFV
Typical Waveforms
VOUT
50mV/div
49mV
IOUT
2A/div
4.0A
IOUT=0A to 4A/4μsec
t(10μsec/div)
Figure 1. Transient Response
(0A to 4A)
COUT=22μF, CFB=1000pF
VOUT
50mV/div
59mV
IOUT
2A/div
4.0A
IOUT=0A to 4A/4μsec
t(10μsec/div)
Figure 2. Transient Response
(0A to 4A)
COUT=100μF
VOUT
50mV/div
46mV
IOUT
2A/div
4.0A
IOUT=0A to 4A/4μsec
t(10μsec/div)
Figure 3. Transient Response
(0A to 4A)
COUT=100μF, CFB=1000pF
VOUT
50mV/div 42mV
IOUT
2A/div
4.0A
IOUT=4A to 0A/4μsec
t(100μsec/div)
Figure 4. Transient Response
(4A to 0A)
COUT=22μF, CFB=1000pF
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/23
TSZ02201-0J2J0A601000-1-2
02.Nov.2015 Rev.001
5 Page 
BD3522EFV
Typical Performance Curves – continued
30
VOUT=2.5V
28
26
VOUT=1.8V
24
VOUT=1.5V
22
VOUT=1.2V
20
357
Supply VVoclcta[Vg]e : VCC [V]
Figure 23. ON-Resistance vs Supply Voltage
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/23
TSZ02201-0J2J0A601000-1-2
02.Nov.2015 Rev.001
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet BD3522EFV.PDF ] | |
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