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PDF BD9130NV Data sheet ( Hoja de datos )
| Número de pieza | BD9130NV | |
| Descripción | Synchronous Buck Converter | |
| Fabricantes | ROHM Semiconductor | |
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Datasheet
2.7V to 5.5V, 2.0A 1ch
Synchronous Buck Converter with
Integrated FET
BD9130NV
General Description
BD9130NV is ROHM’s high efficiency step-down
switching regulator designed to provide a voltage as
low as 1V 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 Switches (Nch/Pch 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:
Pch FET ON-Resistance:
Nch FET ON-Resistance:
Standby Current:
Operating Temperature Range:
2.7V to 5.5V
1.0V to 2.5V
2.0A (Max)
1MHz(Typ)
200mΩ(Typ)
160mΩ(Typ)
0μA (Typ)
-25°C to +105°C
Package
W(Typ) x D(Typ) x H(Max)
Applications
Power Supply for LSI including DSP, Microcomputer
and ASIC
Typical Application Circuit
SON008V5060
5.00mm x 6.00mm x 1.00mm
CIN L
VCC
VCC,PVCC
EN SW
ADJ
ITH
GND,PGND
RITH
CO
CITH
VOUT
R2
R1
Figure 1. Typical Application Circuit
○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
1/21
TSZ02201-0J3J0AJ00130-1-2
02.Oct.2014 Rev.002
1 page  
BD9130NV
Typical Performance Curves - continued
[VOUT=1.8V]
VCC=3.3V
Ta=25°C
[VOUT=2.5V]
VCC=5V
Ta=25°C
Output Current: IOUT [mA]
Figure 8. Efficiency vs Output Current
VCC=3.3V
Temperature: Ta [°C]
Figure 9. Frequency vs Temperature
VCC=3.3V
VCC=3.3V
Temperature: Ta [°C]
Figure 10. ON-Resistance vs Temperature
Temperature: Ta [°C]
Figure 11. EN Voltage vs Temperature
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/21
TSZ02201-0J3J0AJ00130-1-2
02.Oct.2014 Rev.002
5 Page 
BD9130NV
4. Switching Regulator Efficiency
Efficiency η may be expressed by the equation shown below:
VOUT IOUT 100 POUT 100 POUT 100
VIN IIN
PIN POUT Pd
%
Efficiency may be improved by reducing the switching regulator power dissipation factors Pdα as follows:
Dissipation factors:
(1) ON-Resistance Dissipation of Inductor and FET: Pd(I2R)
Pd I 2R IOUT 2 RCOIL RON
where:
RCOIL is the DC resistance of inductor.
RON is the ON-Resistance of FET.
IOUT is the output current.
(2) Gate Charge/Discharge Dissipation: Pd(Gate)
PdGate Cgs f V 2
where:
Cgs is the gate capacitance of FET.
f is the switching frequency.
V is the gate driving voltage of FET.
(3) Switching Dissipation: Pd(SW)
PdSW VIN 2 CRSS IOUT f
I DRIVE
where:
CRSS is the reverse transfer capacitance of FET.
IDRIVE is the peak current of gate.
(4) ESR Dissipation of Capacitor: Pd(ESR)
PdESR I RMS 2 ESR
where:
IRMS is the ripple current of capacitor.
ESR is the equivalent series resistance.
(5) Operating Current Dissipation of IC: Pd(IC)
PdIC VIN ICC
where:
ICC is the circuit current.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/21
TSZ02201-0J3J0AJ00130-1-2
02.Oct.2014 Rev.002
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet BD9130NV.PDF ] | |
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