BD9781HFP-TR Rohm Semiconductor, BD9781HFP-TR Datasheet - Page 4

• Manufacturer Part Number: BD9781HFP-TR
• Description: IC REG SW 4A P-CH MOSF STDN HRP7
• Manufacturer: Rohm Semiconductor
• Type: Step-Down (Buck)r
• Series: -r

Specifications of BD9781HFP-TR

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1 ~ 35 V
• Current - Output: 4A
• Frequency - Switching: 50kHz ~ 500kHz
• Voltage - Input: 7 ~ 35 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: HRP-7
• Power - Output: 5.5W
• Output Voltage: 1 V
• Output Current: 4 A
• Input Voltage: 35 V
• Switching Frequency: 102 KHz
• Operating Temperature Range: - 40 C to + 125 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Reference data
1.020
1.015
1.010
1.005
1.000
0.995
0.990
0.985
0.980
Fig.10 ON resistance V
Fig.1 Output reference voltage vs.
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
10
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
Fig.4 Standby current
-50
0.0
0
Ambient temprature
0
Fig.7 Circuit current
0.5
AMBIENT TEMPERATURE : Ta[ ]
-25
5
5
OUTPUT CURRENT : I
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
INPUT VOLTAGE : V
INPUT VOLTAGE : V
10
10
0
15
15
25
20
20
Ta=25
50
25
25
IN
(All series)
(BD9778F/HFP)
From the top, -40
(BD9778F/HFP)
=7V
75
IN
IN
30
30
[V]
O
[V]
[A]
Ta=-40
Ta=125
100
(BD9781HFP)
35
35
125
25
125
40
40
Fig.11 ON resistanceV
600
500
400
300
200
100
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
40
30
20
10
0
4
3
2
1
-50
0.0
0
0
Fig.2 Frequency vs. Ambient
Fig.5 Standby current
Fig.8 Circuit current
0.5
-25
AMBIENT TEMPERATURE : Ta[ ]
10
10
temperature
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
OUTPUT CURRENT : I
INPUT VOLTAGE : V
INPUT VOLTAGE : V
4/16
0
20
20
25
30
30
Ta=25
50
IN
(All series)
=13.2V
40
40
From the top, 125
(BD9001F)
75
IN
IN
(BD9001F)
[V]
[V]
O
Ta=-40
[A]
Ta=125
50
50
100
(BD9781HFP)
390kΩ
910kΩ
125
–40
-40
39kΩ
91kΩ
25
25
125
60
60
Fig.12 ON resistance V
Fig.9 ON resistance V
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
10
9
8
7
6
5
4
3
2
1
0
4
3
2
1
0
0.0
Fig.3 Standby current
0.0
0
0
Fig.6 Circuit current
V
Istb=0.14μA
Ta=125
0.5
CC
5
5
=12V
0.5
OUTPUT CURRENT : I
1.0 1.5 2.0 2.5 3.0 3.5 4.0
OUTPUT CURRENT : I
INPUT VOLTAGE : V
INPUT VOLTAGE : V
10
10
15
15
Ta=-40
1.0
Ta=-40
20
20
Ta=25
Ta=125
Ta=25
1.5
IN
IN
25
25
125
=5V
From the top, -40
=5V
25
(BD9781HFP)
(BD9781HFP)
IN
IN
30
30
O
[V]
[V]
O
[A]
2.0
[A]
(BD9781HFP)
(BD9778F/HFP)
35
35
125
-40
25
2.5
40
40
4.5