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BU34DV7NUX-E2 Datenblatt(PDF) 1 Page - Rohm |
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BU34DV7NUX-E2 Datenblatt(HTML) 1 Page - Rohm |
1 / 27 page BU34DV7NUX ○ Product structure:Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays. . 1/24 TSZ02201-0Q1Q0AH00100-1-2 © 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 BU34DV7NUX ●General Description The BU34DV7NUX 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 BU34DV7NUX 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. BU34DV7NUX output voltage is fixed by an internal resistor divider. When VIN voltage is higher than 3.4 V, Vout is connected with Vin. ●Features ・ Synchronous Boost DC/DC Converter(PFM/PWM) 300mA @Vout=3.4V, Vin=1.8V ・ Fixed Output voltage (3.4V) ・ Pass-Through Function1 (VIN > VOUT<3.4V>) ・ Thermal Shutdown ・ VSON010X3030 (Small Package) ●Key Specifications ■ Input voltage range: 1.8V to 5.5V ■ Output Voltage range: 3.33V to 3.47V ■ 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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Ähnliche Beschreibung - BU34DV7NUX-E2 |
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