High efficiency synchronous step-up regulator based on the L6926

The STEVAL-ISA078V1 demonstration board is a high efficiency monolithic synchronous step-down regulator capable of delivering up to 800 mA of continuous output current and of regulating the output voltage from 0.6 V up to VINthanks to the 100% duty cycle operation capability.

The input voltage ranges from 2 V to 5.5 V.

The control loop architecture is based on a constant frequency peak current mode, while high efficiency at light loads is achieved by a low consumption functionality.

The very low quiescent current (25 μA) and shutdown current (0.2 μA) means that the device is very suitable for supplying battery-powered equipment like PDAs, hand-held terminals, DSCs (digital still cameras) and cellular phones.

The switching frequency is internally set at 600 kHz, but the device can be externally synchronized up to 1.4 MHz. An internal reference voltage of 0.6 V (typ.) allows the device to regulate a minimum output voltage of the same low value.

The low MOSFET RDS(on)ensures high efficiency at high output current.

Additional beneficial features are: hysteretic UVLO, OVP, constant current short-circuit protection, Power Good and thermal shutdown.

The MSOP8 package allows significant space savings on the board.

Key Features

  • 2 V to 5.5 V battery input range
  • High efficiency: up to 95%
  • Extremely low quiescent current
  • 1 μA max. shutdown supply current
  • 800 mA max. output current
  • Adjustable output voltage from 0.6 V
  • Low dropout operation: up to 100% duty cycle
  • ± 1% output voltage accuracy
  • 600 MHz switching frequency externally synchronizable up to 1.4 MHz
  • Short-circuit protection
  • RoHS compliant

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设计

技术文档

产品规格
Description Version Size
DB1573 DB1573: High efficiency synchronous step-up regulator based on the L6926 1.1 1 MB

硬件资源

Board Manufacturing Specifications
Description Version Size
STEVAL-ISA078V1 gerber files 2.1 180 KB
Bill of Materials
Description Version Size
STEVAL-ISA078V1 BOM 1.0 71 KB
Schematic Packs
Description Version Size
STEVAL-ISA078V1 schematics 1.0 27 KB

法律

许可协议
Description Version Size
Evaluation products license agreement 1.0 125 KB
支持和社区

样片和购买

型号 Core Product Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STEVAL-ISA078V1 L6926 Active 31.85 1 NEC EAR99 ITALY MORE INFO 直接购买 Add to cart DISTRIBUTOR AVAILABILITY
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(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

质量和可靠性

型号 Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEVAL-ISA078V1 ActiveCARDIndustrialEcopack2
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(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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