BD3951F-E2 Rohm Semiconductor, BD3951F-E2 Datasheet - Page 5

• Manufacturer Part Number: BD3951F-E2
• Description: IC REG LDO W/VOLT DETECT 8SOP
• Manufacturer: Rohm Semiconductor

Specifications of BD3951F-E2

• Regulator Topology: Positive Fixed
• Voltage - Output: 5V
• Voltage - Input: 6 ~ 20 V
• Voltage - Dropout (typical): 0.31V @ 100mA
• Number Of Regulators: 1
• Current - Output: 150mA (Min)
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOP
• Primary Input Voltage: 13.5V
• Output Voltage: 5.1V
• Dropout Voltage Vdo: 310mV
• No. Of Pins: 8
• Output Current: 150mA
• Voltage Regulator Case Style: SOP
• Operating Temperature Range: -40°C To +125°C
• Svhc: No
• Mounting Style: SMD/SMT
• Output Voltage Fixed: 5.1V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

●Input/Output terminal Circuit
●How to set RESET delay time using CT terminal capacitor
BD3951F
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SIN(2pin)
There are three factors to define the RESET delay time TdLH. External capacitor value Cct of the CT terminal, internal
charge resistor and internal reference voltage. RESET delay time is approximately described as below equation.
Internal charge resistor 300k has some inaccuracy. The deviation of this inaccuracy is shown in Fig. 16. However, as
TdLH delay time may be effected by application board, application board test is recommended to select the right Cct.
Vcc
10,000
1,000
20k
200k
100
RES(6pin)
SIN(2pin)
10
1
0.01
(TYP): TdLH≒300K × Cct(sec)
OUT(8pin)
RES(6pin)
0.1
Cct[μF]
Fig.16
RADJ(3pin)
1
Vcc
20k
10
SOUT(7pin)
RADJ(3pin)
Fig.15
340
(MAX): TdLH≒530k×Cct
(TYP): TdLH≒300k×Cct
(MIN): TdLH≒170k×Cct
5/9
OUT(8pin)
SOUT(7pin)
1260k
420k
300k
4.1k
OUT(8pin)
CT(4pin)
Technical Note
Vcc
2009.07 - Rev.A
CT(4pin)
OUT(8pin)
Vcc