BD9140MUV-E2 Rohm Semiconductor, BD9140MUV-E2 Datasheet - Page 5

• 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

●Information on advantages
© 2009 ROHM Co., Ltd. All rights reserved.
BD9141MUV
www.rohm.com
Advantage 1：Offers fast transient response with current mode control system.
Advantage 2： Offers high efficiency for all load range.
Advantage 3：・Supplied in smaller package due to small-sized power MOS FET incorporated.
・For lighter load:
・For heavier load:
Utilizes the current mode control mode called SLLM for lighter load, which reduces various dissipation such as switching
dissipation (P
dissipation (P
Utilizes the synchronous rectifying mode and the low on-resistance MOS FETs incorporated as power transistor.
R
C
Offers high efficiency for all load range with the improvements mentioned above.
ITH
ITH
V
Conventional product (Load response I
I
OUT
OUT
ON resistance of P-channel MOS FET : 150mΩ(Typ.)
ON resistance of N-channel MOS FET : 80mΩ(Typ.)
Reduces a mounting area required.
RON
SW
Convertor
Controller
), gate charge/discharge dissipation, ESR dissipation of output capacitor (P
) that may otherwise cause degradation in efficiency for lighter load.
DC/DC
Voltage drop due to sudden change in load was reduced by about 50%.
V
Achieves efficiency improvement for lighter load.
Achieves efficiency improvement for heavier load.
CC
Fig.18 Comparison of transient response
L
・Output capacitor Co required for current mode control: 22μF ceramic capacitor
・Inductance L required for the operating frequency of 1MHz: 2.2μH inductor
Cin
O
110mV
=0.5A→1A)
Co
Fig.20 Example application
V
OUT
5/15
V
OUT
I
OUT
(BD9141MUV:Co=22μF, L=4.7μH)
BD9141MUV (Load response I
10mm
R
C
ITH
ITH
15mm
100
50
C
C
0
0.001
IN
O
①
①improvement by SLLM system
②improvement by synchronous rectifier
SLLM
Fig.19 Efficiency
ESR
L
Output current Io[A]
O
=0.5A→1A)
PWM
0.01
Technical Note
2009.09 - Rev.B
) and on-resistance
50mV
0.1
②
1