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Si91845

Features: ` Ultra Low Dropout-130 mV at 150-mA Load` Ultra Low Noise-30 V(rms) (10-Hz to 100-kHz Bandwidth)` Out-of-Regulation Error Flag (power good)` Shutdown Control` Only 110-A Ground Current at 150-mA Load` Fast Start-Up (50 S)` 1.5% Guaranteed Output Voltage Accuracy` 300-mA Peak Output Curr...

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SeekIC No. : 004490947 Detail

Si91845: Features: ` Ultra Low Dropout-130 mV at 150-mA Load` Ultra Low Noise-30 V(rms) (10-Hz to 100-kHz Bandwidth)` Out-of-Regulation Error Flag (power good)` Shutdown Control` Only 110-A Ground Current at...

Si91845 Data Sheet

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Part Number:
Si91845
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2025/12/25

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Product Details

Description



Features:

` Ultra Low Dropout-130 mV at 150-mA Load
` Ultra Low Noise-30 V(rms) (10-Hz to 100-kHz
     Bandwidth)
` Out-of-Regulation Error Flag (power good)
` Shutdown Control
` Only 110-A Ground Current at 150-mA Load
` Fast Start-Up (50 S)
` 1.5% Guaranteed Output Voltage Accuracy
` 300-mA Peak Output Current Capability
` Uses Low ESR Ceramic Capacitors
` Fast Line and Load Transient Response (30 s)
` 1-A Maximum Shutdown Current
` Output Current Limit
` Si91845: Output, Auto-Discharge in Shutdown Mode
` Si91846: Output, No-Discharge in Shutdown Mode
` Fixed 1.8, 2.0, 2.2, 2.5, 2.6, 2.7, 2.8, 2.85, 2.9, 3.0, 3.3,
    3.5, 3.6, 5.0-V Output Voltage Options
` Built-in Short Circuit and Thermal Protection
` Reverse Battery Protection
` Thin SOT23-6 Package


Application

· Cellular Phones, Wireless Handsets
· Noise-Sensitive Electronic Systems, Laptop and
    Palmtop Computers
· PDAs
· Digital Cameras
· Pagers
· MP3 Players
· Wireless Modems


Pinout

Connection Diagram


Specifications

Absolute Maximum Ratings
Input Voltage, VIN to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −6.0 to 6.5 V
ERROR, VSD (See Detailed Description) . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to VIN
Output Current, IOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Short Circuit Protected
Output Voltage, VOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to VIN + 0.3 V
Package Power Dissipation, (Pd)b . . . . . . . . . . . . . . . . . . . . . . . . . . . 440 mW
Package Thermal Resistance, (JA)a . . . . . . . . . . . . . . . . . . . . . . . . . 180/W
Maximum Junction Temperature, TJ(max) . . . . . . . . . . . . . . . . . . . . . . . 150
Storage Temperature, TSTG . . . . . . . . . . . . . . . . . . . . . . . . . . −65 to 150
Notes
a. Device mounted with all leads soldered or welded to PC board.
b. Derate 5.5 mW/above TA = 70


Description

The Si91845/6 is a 150-mA CMOS LDO (low dropout) voltage regulator. It is the perfect choice for low voltage, low power applications. An ultra low ground current and ultra fast turn-on make this part attractive for battery operated power systems.

The Si91845/6 also offers ultra low dropout voltage to prolong battery life in portable electronics. Systems requiring a quiet voltage source will benefit from the Si91845/6's low output noise. It  is designed to maintain regulation while delivering 300-mA peak current, making it ideal for systems that have a high surge current upon turn-on.

For better transient response and regulation, an active pull-down circuit is built into the Si91845/6 to clamp the output voltage when it rises beyond normal regulation. The Si91845 automatically discharges the output voltage by connecting the output to ground through a 100- n-channel MOSFET when the device is put in shutdown mode.

The Si91845/6 features reverse battery protection to limit reverse current flow to approximately 1-A in the event reversed battery is applied at the input, thus preventing damage to the IC.

The Si91845/6 is available in both standard and lead (Pb)-free packages.




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