BD9140MUV-E2 Rohm Semiconductor, BD9140MUV-E2 Datasheet - Page 7

• Manufacturer Part Number: BD9140MUV-E2
• Description: IC SWITCH REG 2A W/FET VQFN020
• Manufacturer: Rohm Semiconductor
• Series: -r
• Type: Step-Down (Buck), PWM - Current Moder

Specifications of BD9140MUV-E2

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 2.5 V ~ 6 V
• Current - Output: 2A
• Frequency - Switching: 500kHz
• Voltage - Input: 4.5 V ~ 13.2 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: *
• Package / Case: *
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

●Description of operations
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BD9141MUV
www.rohm.com
V
V
・Soft-start function
・Shutdown function
・UVLO function
OUT
・Short-current protection circuit with time delay function
EN
CC
EN terminal shifted to “High” activates a soft-starter to gradually establish the output voltage with the current limited
during startup, by which it is possible to prevent an overshoot of output voltage and an inrush current.
With EN terminal shifted to “Low”, the device turns to Standby Mode, and all the function blocks including reference
voltage circuit, internal oscillator and drivers are turned to OFF. Circuit current during standby is 0μA (Typ.).
Detects whether the input voltage sufficient to secure the output voltage of this IC is supplied. And the hysteresis width
of 100mV (Typ.) is provided to prevent output chattering.
Turns OFF the output to protect the IC from breakdown when the incorporated current limiter is activated continuously for
the fixed time(T
UVLO.
Output Short circuit
Standby mode
Threshold Voltage
I
L
V
Limit
LATCH
OUT
EN
Standby
I
L
mode
UVLO
) or more. The output thus held tuned OFF may be recovered by restarting EN or by re-unlocking
Tss
EN
Fig.25 Short-current protection circuit with time delay timing chart
Operating mode
Soft start
Fig.24 Soft start, Shutdown, UVLO timing chart
t1<T
Operating mode
LATCH
Standby
UVLO
mode
7/15
Tss
Hysteresis 100mV
Operating mode
t2=T
LATCH
Timer latch
Standby
mode
EN
Standby
Output OFF
latch
mode
Tss
Operating mode
EN
Operating mode
Technical Note
2009.09 - Rev.B
UVLO
Standby mode