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BU33DV7NUX-E2 数据表(PDF) 1 Page - Rohm

部件名 BU33DV7NUX-E2
功能描述  1.8V to 5.5V, 300mA 1ch Synchronous Boost DC/DC Converter
Download  27 Pages
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制造商  ROHM [Rohm]
网页  http://www.rohm.com
标志 ROHM - Rohm

BU33DV7NUX-E2 数据表(HTML) 1 Page - Rohm

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BU33DV7NUX
Product structure:Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays.
.
1/24
TSZ02201-0Q1Q0AH00110-1-2
© 2012 ROHM Co., Ltd. All rights reserved.
02.Aug.2012 Rev.001
TSZ22111・14・001
www.rohm.com
Datasheet
1.8V to 5.5V, 300mA 1ch
Synchronous Boost DC/DC Converter
BU33DV7NUX
●General Description
The BU33DV7NUX devices provide a power supply
solution for products powered by either two-cell alkaline,
NiCd or NiMH, or one-cell Li-ion or Li-polymer battery.
Output currents can go as high as 300mA while using
two alkaline, and discharge it down to 1.8 V.
With the MODE pin, the BU33DV7NUX provides mode
selection of PWM control or PFM/PWM automatic
switching control. When load current is large, the
product switches automatically to the PWM mode so that
high efficiency is achievable over a wide range of load
conditions. The maximum peak current in the boost
switch is typically limited to a value of 1.85A.
BU33DV7NUX output voltage is fixed by an internal
resistor divider. When VIN voltage is higher than 3.3 V,
Vout is connected with Vin.
●Features
Synchronous Boost DC/DC Converter(PFM/PWM)
300mA @Vout=3.3V, Vin=1.8V
Fixed Output voltage (3.3V)
Pass-Through Function1 (VIN > VOUT<3.3V>)
Thermal Shutdown
VSON010X3030 (Small Package)
●Key Specifications
■ Input voltage range:
1.8V to 5.5V
■ Output Voltage range:
3.23V to 3.37V
■ Output current:
300mA (Max.)
■ Switching frequency:
0.6MHz (Typ.)
■ Pch FET ON resistance:
160mΩ (Typ.)
■ Nch FET ON resistance:
90mΩ (Typ.)
■ Standby current (MODE=0V):
4.5µA (Max.)
■ Standby current (MODE=VIN):
1.5µA (Max.)
■ Operating temperature range:
-40℃to+85℃
Available Features with MODE=0V>
Pass-Through Function2 during EN-OFF
Disconnect Function during UVLO
UVLO-detect Voltage:1.8V(typ)
UVLO-release Voltage:2.0V(typ)
PWM(Switching Frequency 600kHz)
Available Features with MODE=VIN>
Disconnect Function during EN-OFF and UVLO
UVLO-detect Voltage:1.8V(typ)
UVLO-release Voltage:2.0V(typ)
PFM/PWM(Switching Frequency to 600kHz)
●Applications
Two-Cell Alkaline, NiCd or NiMH or
Single-Cell Li Battery-Powered Products
Portable Audio Players
PDA
Cellular Phones
Personal Medical Products
●Package
10-pin small “VSON010X3030” package.
<3.1mm (Typ.) x 3.1mm (Typ.) x 0.6mm (Max.)>
VSON010X3030
●Typical Application Circuit
●Typical Performance characteristics
Figure 1. Application Circuit
Figure 2. Efficiency
C1
EN
AGND
COMP
RSTBC
VOUT
VIN
MODE
RSTBO
SW
PGND
L1
C3
OUT
C2
R1
C4
Necessary at PFM
Efficiency Temp=25℃
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
0.1
1
10
100
1000
Iout [mA]
PFM2.4V
PWM2.4V
PWM1.8V
PFM1.8V


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