BD9870FPS-E2 Rohm Semiconductor, BD9870FPS-E2 Datasheet - Page 8

• Manufacturer Part Number: BD9870FPS-E2
• Description: IC REG SW STEP DOWN TO-252S-5
• Manufacturer: Rohm Semiconductor
• Type: Step-Down (Buck)r

Specifications of BD9870FPS-E2

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Current - Output: 1.5A
• Frequency - Switching: 900kHz
• Voltage - Input: 8 ~ 35 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: DPak, TO-252 (Slim, 4 leads + tab)
• Power - Output: 800mW
• Input Voltage: 36 V
• Switching Frequency: 900 KHz
• Operating Temperature Range: -40 C to +85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: BD9870FPS-E2TR

BD9870FPS
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www.rohm.com
Fig.11 Driver Drain-Source Voltage vs. Output Current
3.0
2.5
2.0
1.5
1.0
0.5
0.0
7
6
5
4
3
2
1
0
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
0.0
0.0
Fig.15 Over Current Protection Characteristics
Fig.13 Output Voltage vs. Supply Voltage
0.5
10
0.5
Output Current[A]
1.0
Input Voltage[V]
Load Current[A]
20
1.5
1.0
Ro=50 Ω
2.0
VCC=8V
VCC=12V
VCC=35V
1.5
30
2.5
2.0
3.0
40
8/11
100
5.05
5.04
5.03
5.02
5.01
5.00
4.99
4.98
4.97
4.96
4.95
90
80
70
60
50
40
30
20
10
0
0
0
Fig.14 Output Voltage vs. Load Current
Fig.12 Efficiency vs. Load Current
Fig.16 Output Start-up Characteristics
500
STBY 0 → 3V
1V/div
VCC=35V
Load Current[mA]
500
Vo
2V/div
VCC=8V
Load Current[mA]
VCC=12V
VCC=24V
VCC=12V
VCC=8V
1000
Ta=25 ℃
Ro=5Ω
L:C10-H5R(MITSUMI)
1000
Technical Note
2009.05 - Rev.A
1500
1500
2000