BD95500MUV-E2 Rohm Semiconductor, BD95500MUV-E2 Datasheet - Page 13

• Manufacturer Part Number: BD95500MUV-E2
• Description: IC BUCK ADJ 6A 40VQFN
• Manufacturer: Rohm Semiconductor
• Type: Step-Down (Buck)r

Specifications of BD95500MUV-E2

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 0.7 ~ 5 V
• Current - Output: 6A
• Frequency - Switching: 30kHz ~ 100kHz
• Voltage - Input: 3 ~ 20 V
• Operating Temperature: -10°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 40-VQFN
• Power - Output: 4.66W
• Output Voltage: 7 V
• Output Current: 6 A
• Input Voltage: 3 V to 20 V
• Switching Frequency: 200 KHz to 1000 KHz
• Operating Temperature Range: - 10 C to + 100 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: BD95500MUV-E2TR

PGND
PGND
VOUT
HG
PGND
HG
HG
LG
LG
LG
4. Setting Detection Resistance
I
LIMIT
0
I
L
Current limit
SW
SW
SW
VIN
VIN
VIN
Current limit
Current limit
Is+
Is-
IL
L
r
detect point
IL
L
L
Is+
Is+
Is-
Is-
IL
R1
R2
RL
C
R
R1
R2
R
Co
Co
Co
t
VOUT
VOUT
VOUT
As soon as the voltage drop between Is+ and Is- generated by the inductor
current becomes specific threshold, the gate voltage of the high side
MOSFET becomes low.
Since the peak voltage of the inductor ripple current is detected, this
operation can sense high current ripple operation caused by inductance
saturated rated current and lead to high reliable systems.
(V
The over current protection function detects the output ripple current peak
value. This parameter (setting value) is determined as in formula (10)
below.
I
(V
When the over current protection is detected by DCR of coil L, this
parameter (setting value) is determined as in formula (11) below.
I
(V
When the output voltage is 2.7V or more, use the resistance for setting
output voltage like left figure, for Is+ and Is-.
According to the setting value above, I
to the divided ratio.
(RL=
I
LMIT
LMIT
LMIT
ILIM
ILIM
ILIM
=
=V
=
: ILIM voltage R: Detection resistance)
: ILIM voltage, R: Detection resistance)
:ILIM voltage, RL: the DCR value of coil)
r×C
ILIM
L
R1+R2
V
13/20
ILIM
R1
×0.1×
R
)
×0.1
×
r×C
[A]・・・(10)
L
V
LIMIT
[A]・・・(11)
R
×0.1
[A]・・・(12)
LIMIT
setting current is in proportion