BD9324EFJ-E2 Rohm Semiconductor, BD9324EFJ-E2 Datasheet - Page 10

• Manufacturer Part Number: BD9324EFJ-E2
• Description: IC CONVERTER REG 4A HTSOP-J8
• Manufacturer: Rohm Semiconductor
• Series: -r
• Type: Step-Down (Buck), PWM - Current Moder

Specifications of BD9324EFJ-E2

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1 V ~ 18 V
• Current - Output: 4A
• Frequency - Switching: 380kHz
• Voltage - Input: 4.75 V ~ 18 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: *
• Package / Case: *
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

z Selecting the Feedforward Capacitor
Across the upper resistor R2, a bypass capacitor is needed to have a better transient response.
+
-
Depending on the PCB patterns or conditions,
the further adjustment beyond the calcurated value above might be needed.
C2 will set a zero in the loop together with R2.
COMP
SW
R1
F
F
C2 =
LC
z2
L
C1
=
=
C
3 F
out
2S F
2S
LC
R2
1
L C
1
z2
R2
out
10/14
C2
[Hz]
[Hz]
[F]
F
C1 =
F
z1
LC
transient response, the bypass capacitors for
phase compensation are needed.
the external components connected to COMP pin.
C1 is decided by the following formula.
The regulator loop can be compensated by adjusting
=
=
For a stable converter loop and the best
1/3 F
2S F
2S
LC
L C
1
1
z1
R1
out
[Hz]
[Hz]
[F]