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LP3923

不推薦在新設計中採用

手機電源管理單元 IC (PMIC)

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產品規格表
LP3923 不建議用於新設計
儘管為了支援以前的設計而繼續生產此項產品，但我們並不建議用在新設計上。考量下列其中一項替代產品：
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LP8725 現行 適用應用/多媒體處理器和子系統的電源管理 IC (PMIC) PMIC for application or multimedia processors and sub-systems with dynamic voltage scaling.

LP3923

不推薦在新設計中採用
產品規格表 立即訂購

產品詳細資料

Vin (min) (V) 3 Vin (max) (V) 5.5 Vout (min) (V) 0.8 Vout (max) (V) 3.3 Iout (max) (A) 0.7 Features Comm control Rating Catalog Operating temperature range (°C) -40 to 125
Vin (min) (V) 3 Vin (max) (V) 5.5 Vout (min) (V) 0.8 Vout (max) (V) 3.3 Iout (max) (A) 0.7 Features Comm control Rating Catalog Operating temperature range (°C) -40 to 125
DSBGA (YZR) 30 8.9375 mm² 3.25 x 2.75
  • Integrated Li-Ion Battery Charger with Power FET, Thermal Regulation and 28V OVP
  • Six Low-Noise LDOs, Two LILO LDOs
    • 3 x 300 mA
    • 4 x 150 mA
    • 1 x 80 mA
  • One High Efficiency Synchronous Magnetic Buck Regulators, IOUT 700 mA
    • High Efficiency PFM Mode @low IOUT
    • Auto Mode PFM/PWM Switch
    • Low Inductance 2.2 µH @ 2 MHz Clock
  • I2C-compatible Interface for Controlling LDO Outputs and Charger Operation
  • Thermal Shutdown with Early Warning Alarm
  • Under-Voltage Lockout
  • 30-bump 3.0 x 2.5 mm DSBGA Package

Key Specifications

  • 50 mA to 1200 mA Charging Current
  • 3.0V to 5.5V Input Voltage Range
  • 135 mV typ. Dropout Voltage @ 300 mA LDOs
  • 2% (typ.) Output Voltage accuracy on LDOs
  • 700 mA (typ.) Buck Regulator

All trademarks are the property of their respective owners.

  • Integrated Li-Ion Battery Charger with Power FET, Thermal Regulation and 28V OVP
  • Six Low-Noise LDOs, Two LILO LDOs
    • 3 x 300 mA
    • 4 x 150 mA
    • 1 x 80 mA
  • One High Efficiency Synchronous Magnetic Buck Regulators, IOUT 700 mA
    • High Efficiency PFM Mode @low IOUT
    • Auto Mode PFM/PWM Switch
    • Low Inductance 2.2 µH @ 2 MHz Clock
  • I2C-compatible Interface for Controlling LDO Outputs and Charger Operation
  • Thermal Shutdown with Early Warning Alarm
  • Under-Voltage Lockout
  • 30-bump 3.0 x 2.5 mm DSBGA Package

Key Specifications

  • 50 mA to 1200 mA Charging Current
  • 3.0V to 5.5V Input Voltage Range
  • 135 mV typ. Dropout Voltage @ 300 mA LDOs
  • 2% (typ.) Output Voltage accuracy on LDOs
  • 700 mA (typ.) Buck Regulator

All trademarks are the property of their respective owners.

The LP3923 is a fully Integrated Power Management Unit (PMU) designed for CDMA cellular phones.

The LP3923 PMU contains a fully integrated Li-Ion battery charger with power FET and over-voltage-protection (OVP), one Buck regulator, 8 low-noise low-dropout (LDO) voltage regulators, and a high-speed serial interface to program on/off conditions and output voltages of individual regulators, and to read status information of the PMU. Two LILO (low-input, low-output) type LDOs with separate power input provide an application option for pre-regulated high efficient power management for longer battery life.

The Li-Ion charger can safely charge and maintain a single cell Li-Ion battery operating from an AC adapter. The charger integrates a power FET, a reverse current blocking diode, a sense resistor with current monitor output, and requires only a few external components. Charging is thermally regulated to obtain the most efficient charging rate for a given ambient temperature.

A built-in Over-Voltage Protection (OVP) circuit at the charger inputs protects the PMU from input voltages up to +28V, eliminating the need for any external protection circuitry.

Buck regulator has an automatic switch to PFM mode at low load conditions providing very good efficiency at low output currents. An external divider circuitry provides user defined buck output voltage.

A-type LDO regulators provide excellent PSRR and very low noise, 10 µV typ., ideally suited for supplying voltage to RF and other analog sections.

The LP3923 is a fully Integrated Power Management Unit (PMU) designed for CDMA cellular phones.

The LP3923 PMU contains a fully integrated Li-Ion battery charger with power FET and over-voltage-protection (OVP), one Buck regulator, 8 low-noise low-dropout (LDO) voltage regulators, and a high-speed serial interface to program on/off conditions and output voltages of individual regulators, and to read status information of the PMU. Two LILO (low-input, low-output) type LDOs with separate power input provide an application option for pre-regulated high efficient power management for longer battery life.

The Li-Ion charger can safely charge and maintain a single cell Li-Ion battery operating from an AC adapter. The charger integrates a power FET, a reverse current blocking diode, a sense resistor with current monitor output, and requires only a few external components. Charging is thermally regulated to obtain the most efficient charging rate for a given ambient temperature.

A built-in Over-Voltage Protection (OVP) circuit at the charger inputs protects the PMU from input voltages up to +28V, eliminating the need for any external protection circuitry.

Buck regulator has an automatic switch to PFM mode at low load conditions providing very good efficiency at low output currents. An external divider circuitry provides user defined buck output voltage.

A-type LDO regulators provide excellent PSRR and very low noise, 10 µV typ., ideally suited for supplying voltage to RF and other analog sections.
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* Data sheet LP3923 Cellular Phone Power Management Unit datasheet (Rev. B) 2013年 5月 3日

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DSBGA (YZR) 30 Ultra Librarian
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