BD9870FPS-E2 Rohm Semiconductor, BD9870FPS-E2 Datasheet - Page 6

• 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

●Test Circuit
BD9870FPS
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＜Recommended Components (Example)＞
＜Recommended Components example 2＞…when the Duty ratio of output/input voltage is less than 10%
Inductor
Schottky Diode
Capacitor
Inductor
Schottky Diode
Capacitor
+
Vcc
Icc
Vcc
1
A
L1＝10μH
D1
D2
C1＝10μF(25V) ：ceramic cap GRM31CB31E106KA75L(murata)
C2＝4.7μF(50V) ：ceramic cap GRM32EB31H475KA87L(murata)
C3＝OPEN
L1＝10μH
D1
D2
C1＝100μF(25V)：Al electric capacitor UHD1E101MED(nichicon)
C2＝4.7μF(50V) ：ceramic cap GRM32EB31H475KA87L(murata)
C3＝OPEN
f
OUT
2
SW2
GND
FIN
Fig.4
6/11
：C6-K3LA (MITSUMI)
：RB050LA-30（ROHM）… use when VCC is less than 30V
：RB050LA-40（ROHM）… use when VCC is greater than 30V
：C6-K3LA (MITSUMI)
：RB050LA-30（ROHM）… use when VCC is less than 30V
：RB050LA-40（ROHM）… use when VCC is more than 30V
1kΩ
2kΩ
+
INV
4
SW4
A
Vo
V
I
INV
V
INV
STB
5
Io
A
SW5
VST
ISTB
SW6
Technical Note
2009.05 - Rev.A