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PDF BD3502FVM Data sheet ( Hoja de datos )
| Número de pieza | BD3502FVM | |
| Descripción | Nch FET Ultra LDO Controllers | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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High Performance Regulators for PCs
Nch FET Ultra LDO Controllers
for PC Chipsets
BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM
No.10030EAT29
●Description
The BD3500/01/02/04FVM is an ultra-low dropout linear regulator controller for chipset that can achieve ultra-low voltage
input to ultra-low voltage output. By using N-MOSFET for external power transistor, the controller can be used at ultra-low
I/O voltage difference up to voltage difference generated by ON resistance. In addition, because best suited power
transistor can be chosen in accord with the output current, downsizing and cost reduction of the set can be achieved.
Because by reducing the I/O voltage difference, large current output is achieved and conversion loss can be reduced,
switching power supply can be replaced. BD3500/01/02/04FVM does not need any choke coil, diode for rectification and
power transistor which are required for switching power supply, total cost of the set can be reduced and compact size can be
achieved for the set. Using external resistors, optional output from 0.65V to 2.5V can be set. In addition, since voltage
output start-up time can be adjusted by using the NRCS terminal, it is possible to flexibly meet the power supply sequence of
the set.
●Features
1) Reduced rush current by NRCS
2) Built-in driver for external Nch h transistor
3) Adoption of MSOP8 package: 2.9 x 4.0 x 0.9 (mm)
4) Built-in timer latch short protection circuit
5) Built-in low input maloperation prevention circuit
6) Output voltage variable type
7) Built-in overheat protection circuit
●Applications
Mobile PC, desktop PC, digital home appliances
●Line up matrix
Parameter
Output Voltage
NRCS
(Soft start)
Timer latch short
protection circuit
VIN UVLO
External FET
GATE Drive Current
BD3500FVM
1.8V (Fix)
○
(Independent Setting)
○
(Independent Setting)
Hysterisis
+1/-3mA
BD3501FVM
1.5V (Fix)
○
(Independent Setting)
○
(Independent Setting)
Hysterisis
+1/-3mA
BD3502FVM
BD3504FVM
1.2V (Fix)
Variable(0.65～2.5V)
○
(Independent Setting)
○
(Same Timer Latch)
○
(Independent Setting)
○
(Same NRCS)
Hysterisis
Detected at start-up only
(set by external resistor)
+1/-3mA
+3/-3mA
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
1/16
2010.05 - Rev.A
1 page  
BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM
●Reference Data
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
-60
-10 40 90
Ta(℃)
Fig.1 Ta-ISTB
140
1.00
0.80
0.60
0.40
0.20
0.00
4.5
4.7 4.9 5.1 5.3
VCC(V)
Fig.2 ICC-VCC
5.5
Technical Note
1.800
1.795
1.790
1.785
1.780
1.775
1.770
-10
15 40 65
Ta(℃)
Fig.3 Ta-Vo
90
12
11
10
9
8
7
6
25
50 75 100 125 150
Ta(℃)
Fig.4 Ta-IEN
300
250
200
150
100
50
0
0 0.2 0.4 0.6 0.8 1 1.2
Vout(mV)
Fig.5 VS Discharge Current
21.5
21
20.5
20
19.5
19
18.5
-60
-10 40
90
Ta(℃)
Fig.6 Ta-ISCP
140
1.26
1.255
1.25
1.245
1.24
1.235
1.23
-60
-10 40
90
Ta(℃)
Fig.7 Ta-Vo
VCC
VIN
EN
VOUT
(1.075V 出力)
140
Fig.8 Input Sequence 1
EN
VCC
VIN
EN
VOUT
(1.075V 出力)
Fig 9. Input Sequence 2
VIN
VCC
VIN
EN
VOUT
(1.075V 出力)
Fig.10 Input Sequence 3
Vcc
VIN
VOUT
(1.075V 出力)
EN
VOUT
Fig.11 Input Sequence 4
(Only BD3504FVM)
IOUT
(1A/div)
Fig.12 Transient Response
0→3A(0.6A/µs)ΔV=30mV
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
5/16
2010.05 - Rev.A
5 Page 
BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM
Technical Note
●Evaluation Board (BD3500/01/02FVM)
■BD350XFVM Evaluation Board Circuit
VCC
U1
BD350XFVM
S1
8 EN
VIN 5
3 SCP
1 NRCS
G7
C2 C3
6
VFB
VCC
4 VCC
C1
2 GND
■BD350XFVM Evaluation Board Application Components
Part No Value Company
Parts Name
VIN U1 - ROHM BD3500/01/02FVM
U2 NMOS ROHM
RTW060N03
C4 C1 1µF MURATA GRM18 series
U2
C2 0.01µF MURATA
GRM18 series
VOUT
Part No Value Company
Parts Name
C5
C3 0.01µF MURATA
GRM18 series
C4 10µF MURATA GRM21 series
C5 220µF SANYO,etc 2R5TPE220MF
■ BD350XFVM Evaluation Board Layout
Silk Screen
TOP Layer
Bottom Layer
●Evaluation Board (BD3504FVM)
■BD3504FVM Evaluation Board Circuit
VCC
U1
BD3504FVM
VD 8
S1
C2
VCC
C1
3 EN
1 NRCS
4 VCC
2 GND
G7
VS 6
VFB 5
VTTS
R2’
R1’ C3
U2
R2 C4
R1
■ BD3504FVM Evaluation Board Layout
Silk Screen
■BD3504FVM Evaluation Board Application Components
GND
Part No Value Company
Parts Name
U1
-
ROHM
BD35304FVM
VIN
U2 NMOS ROHM
RTW060N03
R1 3.9K ROHM MCR03EZPF3901
R1’ 3.3K ROHM MCR03EZPF3301
R2 3.9K ROHM MCR03EZPF3901
VOUT
Part No
R2’
C1
C2
C3
C4
Value
3.3K
1µF
0.01µF
10µF
220µF
Company
ROHM
MURATA
MURATA
MURATA
SANYO,etc
Parts Name
MCR03EZPF3301
GRM18 series
GRM18 series
GRM21 series
2R5TPE220MF
TOP Layer
Bottom Layer
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
11/16
2010.05 - Rev.A
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet BD3502FVM.PDF ] | |
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