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BD3504FVM-FTR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
1/16
www.rohm.com
2010.05 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
High Performance Regulators for PCs
Nch FET Ultra LDO Controllers
for PC Chipsets
BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM
●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 BD3500FVM BD3501FVM BD3502FVM BD3504FVM
Output Voltage 1.8V (Fix) 1.5V (Fix) 1.2V (Fix) Variable(0.65～2.5V)
NRCS
(Soft start)
○
(Independent Setting)
○
(Independent Setting)
○
(Independent Setting)
○
(Same Timer Latch)
Timer latch short
protection circuit
○
(Independent Setting)
○
(Independent Setting)
○
(Independent Setting)
○
(Same NRCS)
VIN UVLO Hysterisis Hysterisis Hysterisis
Detected at start-up only
(set by external resistor)
External FET
GATE Drive Current
+1/-3mA +1/-3mA +1/-3mA +3/-3mA
No.10030EAT29
BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM
Technical Note
2/16
www.rohm.com
2010.05 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
●Absolute maximum ratings (Ta=25℃)
◎BD3500/01/02FVM
Parameter Symbol Ratings Unit
Input Voltage VCC 7 *
1
V
Drain Voltage (VIN) VIN 7 V
Enable Input Voltage Ven 7 V
Power Dissipation Pd 437.5 *
2
mW
Operating Temperature Range Topr -10～+100 ℃
Storage Temperature Range Tstg -55～+150 ℃
Maximum Junction Temperature Tjmax +150 ℃
*1 However, not exceeding Pd.
*2 Pd derating at 3.5mW/℃ for temperature above Ta=25℃
◎BD3504FVM
Parameter Symbol Ratings Unit
Supply Voltage VCC 7 *
3
V
Drain Voltage VD 7 V
Enable Input Voltage Ven 7 V
Power dissipation Pd 437.5 *
4
mW
Operating temperature range Topr -10～+100 ℃
Storage temperature range Tstg -55～+150 ℃
Maximum Junction Temperature Tjmax +150 ℃
*3 However, not exceeding Pd.
*4 Pd derating at 3.5mW/℃ for temperature above Ta=25℃
●Recommended operating conditions
◎BD3500/01/02FVM
Parameter
Symbol
Ratings
Unit
MIN MAX
Supply Voltage VCC 4.5 5.5 V
Drain Voltage(VIN) VIN Vo×1.15 5.5 V
Enable Input Voltage Ven -0.3 5.5 V
Capacitor on NRCS Terminal CNRCS 0.001 1 µF
Capacitor on SCP Terminal CSCP 0.001 1 µF
★ No radiation-resistant design is adopted for the present product.
◎BD3504FVM
Parameter Symbol
Ratings
Unit
MIN MAX
Supply Voltage VCC 4.5 5.5 V
Drain Voltage VD 0.65 5.5 V
Enable Input Voltage Ven -0.3 5.5 V
Capacitor in NRCS pin CNRCS 0.001 1 µF
Output Voltage VOUT 0.65 2.5 V
★ No radiation-resistant design is adopted for the present product.
BD3504FVM,BD3500FVM,BD3501FVM,BD3502FVM
Technical Note
3/16
www.rohm.com
2010.05 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
●Electrical characteristics (unless otherwise noted, Ta=25℃ VCC=5V Vin=3.3V Ven=3V)
◎BD3500FVM/BD3501FVM/BD3502FVM
Parameter Symbol
Standard Value
Unit Condition
MIN TYP MAX
Bias Current ICC - 0.8 1.6 mA
Shut Down Mode Current IST - 0 10 µA Ven=0V
Output Voltage 1 (BD3500FVM) Vo1 1.782 1.800 1.818 V Io=50mA
Output Voltage 1 (BD3501FVM) Vo1 1.485 1.500 1.515 V Io=50mA
Output Voltage 1 (BD3502FVM) Vo1 1.188 1.200 1.212 V Io=50mA
Output Voltage 2 (BD3500FVM) Vo2 1.746 1.800 1.854 V
Vcc=4.5V to 5.5V ,Io=0 to 3A
Ta=-10℃ to 100℃(※)
Output Voltage 2 (BD3501FVM) Vo2 1.455 1.500 1.545 V
Vcc=4.5V to 5.5V ,Io=0 to 3A
Ta=-10℃ to 100℃(※)
Output Voltage 2 (BD3502FVM) Vo2 1.164 1.200 1.236 V
Vcc=4.5V to 5.5V ,Io=0 to 3A
Ta=-10℃ to 100℃(※)
Line Regulation Reg.l - 0.1 0.5 %/V VCC=4.5V to 5.5V
Load Regulation Reg.L - 0.5 10 mV Io=0 to 3A
[Enable]
High Level Enable Input Voltage Enhi 2 - Vcc V
Low Level Enable Input Voltage Enlow -0.3 - 0.8 V
Enable Pin Input Current Ien - 7 10 µA Ven=3V
[NRCS]
NRCS Charge Current Inrcs 14 20 26 µA
Vnrcs=0.5V,VCC=4.5V to 5.5V
Ta=-10℃ to 100℃ (※)
NRCS Standby Voltage Vnrcs - 0 50 mV Ven=0V
[Voltage Feed Back]
VFB Input Bias Current IFB - 0.7 1.2 mA Ven=3V
VFB Standby Current FBSTB 150 - - mA Ven=0V,VFB=1V
[Output MOSFET Driver]
MOSFET Driver Source Current IGSO 0.5 1 1.5 mA VFB=Vo-0.1V,G=Vo+1V
MOSFET Driver Sink Current IGSI 2 3 4 mA VFB=Vo+0.1V,G=Vo+1V
[UVLO]
VCC UVLO VccUVLO 4.2 4.35 4.5 V Vcc:Sweep up
VCC UVLO Hysteresis Vcchys 100 160 220 mV Vcc:Sweep down
VIN UVLO VINUVLO Vo×1.05 Vo×1.1 Vo×1.15 V VIN:Sweep up
VIN UVLO Hysteresis VINhys 100 160 220 mV VIN:Sweep down
[SCP]
SCP Charge Current Iscpch 14 20 26 µA
VSCP=0.5V,VCC=4.5V to 5.5V
Ta=-10℃ to 100℃ (※)
SCP Discharge Current IscpDi 0.5 - - mA VSCP=0.5V
SCP Threshold Voltage Vscpth 1.2 1.3 1.4 V
Short Detect Voltage Vscp Vo×0.6 Vo×0.7 Vo×0.8 V
SCP Stand-by Voltage VSTB - 0 50 mV
(※) Design Guarantee
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

BD3504FVM-FTR

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Description:
LDO Voltage Controllers 4.5-5.5V 1ch FET LDO Control
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