|
|
PDF BD91361MUV Data sheet ( Hoja de datos )
| Número de pieza | BD91361MUV | |
| Descripción | 4A 1ch Synchronous Buck Converter | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de BD91361MUV (archivo pdf) en la parte inferior de esta página. Total 27 Páginas | ||
|
No Preview Available !
Datasheet
2.7V to 5.5V, 4A 1ch
Synchronous Buck Converter with
Integrated FET
BD91361MUV
General Description
BD91361MUV is ROHM’s high efficiency step-down
switching regulator designed to provide a voltage as
low as 0.8V from a supply voltage of 5.5V/3.3V. It
offers high efficiency by using pulse skip control
technology and synchronous switches, and provides
fast transient response to sudden load changes by
implementing current mode control.
Features
Fast Transient Response because of Current Mode
PWM Control System
High Efficiency for All Load Ranges because of
Synchronous Rectifier (Nch/Nch FET)
and SLLMTM (Simple Light Load Mode)
Soft-Start Function
Thermal Shutdown and UVLO Functions
Short-Circuit Protection with Time Delay Function
Shutdown Function
Key Specifications
Input Voltage Range:
Output Voltage Range:
Output Current:
Switching Frequency:
High side FET ON-Resistance:
Low side FET ON-Resistance:
Standby Current:
Operating Temperature Range:
2.7V to 5.5V
0.8V to 3.3V
4.0A (Max)
1MHz(Typ)
60mΩ(Typ)
55mΩ(Typ)
0μA (Typ)
-40°C to +105°C
Package
W(Typ) x D(Typ) x H(Max)
Applications
Power Supply for LSI including DSP, Microcomputer
and ASIC
VQFN020V4040
4.00mm x 4.00mm x 1.00mm
Typical Application Circuit
Rf Cf
VCC
CIN
EN PVCC
VCC
ADJ
CBST
ITH
RITH VID<1> VID<0>
L
SW
CITH
VCC
CO
VOUT
R2
Figure 1. Typical Application Circuit
R1
○Product structure：Silicon monolithic integrated circuit
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111･14･001
○ This product has no designed protection against radioactive rays
1/23
TSZ02201-0J3J0AJ00200-1-2
06.Oct.2014 Rev.002
1 page  
BD91361MUV
Typical Performance Curves - continued
【VOUT=1.2V】
Datasheet
VCC=5V
Ta=25°C
Output Current: IOUT [mA]
Figure 8. Efficiency vs Output Current
VCC=5V
Temperature: Ta [°C]
Figure 9. Frequency vs Temperature
VCC=3.3V
Temperature: Ta [°C]
Figure 10. ON-Resistance vs Temperature
VCC=5V
Temperature: Ta [°C]
Figure 11. EN Voltage vs Temperature
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111･15･001
5/23
TSZ02201-0J3J0AJ00200-1-2
06.Oct.2014 Rev.002
5 Page 
BD91361MUV
Datasheet
3. Information on Advantages
Advantage 1: Offers fast transient response by using current mode control system.
Conventional product (Load response IO=1A to 3A)
BD91361MUV (Load response IO=1A to 3A)
VOUT
145mV
VOUT
62mV
IOUT
IOUT
Voltage drop due to sudden change in load was reduced.
Figure 26. Comparison of Transient Response
Advantage 2: Offers high efficiency for all load ranges.
(a) For lighter load:
This IC utilizes the current mode control called SLLMTM, which reduces various dissipations such as switching
dissipation (PSW), gate charge/discharge dissipation (PGATE), ESR dissipation of output capacitor (PESR) and
ON-Resistance dissipation (PRON) that may otherwise cause reduction in efficiency.
Achieves efficiency improvement for lighter load.
(b) For heavier load:
This IC utilizes the synchronous rectifying mode and uses low ON-Resistance power MOSFETs.
ON-Resistance of High side MOSFET : 60mΩ(Typ)
ON-Resistance of Low side MOSFET : 55mΩ(Typ)
100
SLLMTM
②
Achieves efficiency improvement for heavier load.
Offers high efficiency for all load ranges with the improvements mentioned above.
50 ① PWM
①improvement by SLLM system
②improvement by synchronous rectifier
0
0.001 0.01
0.1
1
Output current IOUT[A]
Advantage 3: ・Supplied in smaller package due to small-sized power MOS FET.
Figure 27. Efficiency
・Required output capacitance, CO ,for current mode control: 22µF ceramic capacitor
・Required inductance, L, for the operating frequency of 1 MHz: 2.2µH inductor
・Incorporates FET + Boot strap diode
Reduces mounting area requirement.
VID<0>
VID<1>
Vcc
EN
VREF
SELECTOR
Gm Amp
+
Current
Comp
+
SLOPE
VCC CLK
Soft
Start
UVLO
TSD
SCP
Current
Sense/
Protect
+
Driver
Logic
VCC
BST
PVCC Input
PVCC
SW
PGND
GND
Output
ADJ
R2
R1
ITH
RITH CITH
20mm
15mm
Rf
Cf CBST
R1
R2
RITH
CITH
CIN L
Co
Figure 28. Example Application
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111･15･001
11/23
TSZ02201-0J3J0AJ00200-1-2
06.Oct.2014 Rev.002
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet BD91361MUV.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| BD91361MUV | 4A 1ch Synchronous Buck Converter | ROHM Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |