BD9845FV-E2 Rohm Semiconductor, BD9845FV-E2 Datasheet - Page 3

IC REG SW STEP DOWN 1CH 14-SSOP

BD9845FV-E2

Manufacturer Part Number
BD9845FV-E2
Description
IC REG SW STEP DOWN 1CH 14-SSOP
Manufacturer
Rohm Semiconductor
Type
Step-Down (Buck)r
Datasheet

Specifications of BD9845FV-E2

Internal Switch(s)
No
Synchronous Rectifier
No
Number Of Outputs
1
Current - Output
1A
Frequency - Switching
100kHz ~ 1.5MHz
Voltage - Input
3.6 ~ 35 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
14-SSOP
Power - Output
500mW
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
BD9845FV-E2TR
●Reference data
© 2009 ROHM Co., Ltd. All rights reserved.
BD9845FV
www.rohm.com
Fig.10 Error amplifier reference voltage
Fig.1 Standby current temperature
Fig.7 UVLO threshold temperature
2.520
2.515
2.510
2.505
2.500
2.495
2.490
2.485
2.480
10
9
8
7
6
5
4
3
2
1
0
3.5
3.4
3.3
3.2
3.1
2.9
2.8
2.7
2.6
2.5
1.008
1.006
1.004
1.002
0.998
0.996
0.994
0.992
Fig.4 VREF supply voltage
1.01
0.99
-50
3
-50
1
temperature characteristics
-50
0
-25
-25
Ambient Temperature: Ta(°C)
5
characteristics
Ambient Temperature: Ta(°C)
characteristics
-25
Ambient Temperature: Ta(°C)
characteristics
Supply Voltage: VCC(V)
0
10
0
0
VCC=6V
15
25
25
Ta=25°C
VCC=6V
25
20
50
50
50
25
75
75
75
30
100
100
100
35
125
40
125
125
Fig.5 VREF current capability
8
7
6
5
4
3
2
1
0
100
2.520
2.515
2.510
2.505
2.500
2.495
2.490
2.485
2.480
-20
80
60
40
20
140
120
100
Fig.11 FB output source current
0
0
80
60
40
20
0
Fig.2 Circuit current in
100
Fig.8 Error amplifier I/O
0
0
5
Ta=85°C
Reference Output Current: IREF(mA)
0.5 1
1K
Ta=-40°C
ErrAmp Output Voltage: VFB(V)
Gain
10
characteristics
Supply Voltage: VCC(V)
operation
Frequency [Hz]
1
3/15
1.5 2
15
10K
Gain
Ta=25°C
Ta=25°C
20
Ta=25°C
VCC=6V
100K
2.5 3
2
Phase
25
Phase
1M
3.5 4 4.5 5
30
VCC=6.0V
3
10M
35
0
-45
-90
-135
-180
-225
-270
40
4
Fig.9 Error amplifier input current
Fig.12 FB output sink current
Fig.3 Circuit current temperature
8
7
6
5
4
3
2
1
0
2.520
2.515
2.510
2.505
2.500
2.495
2.490
2.485
2.480
-0.5
-50
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
characteristics in operation
Fig.6 VREF temperature
0
-50
0
-25
0.2
Ambient Temperature: Ta(°C)
-25
Ta=-40°C
ErrAmp Output Voltage: VFB(V)
Ambient Temperature: Ta(°C)
characteristics
ErrAmp Input Voltage: VINV(V)
0.4
Ta=25°C
0
0.5
0.6
0
VCC=6V
Ta=85°C
25
0.8
2009.05 - Rev.A
Technical Note
VCC=6V
Ta=25℃
VCC=6V
25
1
1
50
50
1.2
VCC=6.0V
1.4
75
75
1.5
1.6
100
100
1.8
125
125
2
2

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