BD9845FV-E2 Rohm Semiconductor, BD9845FV-E2 Datasheet - Page 6

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

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

VREF
●Block diagram/Pin layout
GND
OUT
VCC
© 2009 ROHM Co., Ltd. All rights reserved.
BD9845FV
STB
C5V
www.rohm.com
CT
VREF
INV
DT
FB
SS
CT
Fig.29 Pin layout
VREF
2μA
VREF
SSOFF
MASTER
/SLAVE
200μA
200μA
1V±10mV
-
-
+
+
+
-
ERR
(2.5V)
VCC
REG
1.5V
OSC
2.0V
DT
SS
INV
FB
SEL
OCP-
OCP+
VCC
STB
1.5V
2V
STB
+
+
-
DTOFF
UVLO
PROTECTION LOGIC
OCP
PWM
TSD
Fig.28 Block diagram
MASTER
/SLAVE
1.25V
-
+
DT
Terminal
(1.6msec)
(0.2msec)
number
Hold time
Hold time
10
11
12
13
14
DTLow
1
2
3
4
5
6
7
8
9
6/15
+
-
SEL
Terminal
OCP＋
OCP－
VREF
name
GND
OUT
STB
C5V
SEL
DTLow
Vcc
INV
CT
SS
DT
FB
LS
OCP
OCP
Reference voltage (2.5V) output terminal
Timing capacity external terminal
GROUND
Standby mode setting terminal
Output L side voltage (Vcc-5V)
Output
Power terminal
Output Overcurrent detector + Input terminal
Output Overcurrent detector - Input terminal
Master/Slave mode setting terminal
Output Error amplifier output terminal
Output Error amplifier - input terminal
Output Soft start time setting terminal
Output Dead time setting terminal
+
-
VCC
C5V
OCP+
50mV±10mV
DTOFF
SSOFF
OCP-
VREF
VCC
C5V
Function
C5V
TSD
2.2V
3.2V
3V
DRV
(VCC-5V)
TSD
UVLO
REG
2009.05 - Rev.A
Technical Note
VCC
C5V
GND
VCC
UVLO
C5V
OUT