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Si91821

Features: ` Input Voltage: 2.35−6.0 V` Fixed 1.8-V, 2.5-V, 2.8-V, 3.0-V, 3.3-V, 5.0-V, orAdjustable Output Voltage Options` Low 120-mV Dropout at 300-mA Load` Guaranteed 300-mA Output Current` 500-mA Peak Output Current Capability` Uses Low ESR Ceramic Output Capacitor` Fast Load and Line Tr...

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SeekIC No. : 004490924 Detail

Si91821: Features: ` Input Voltage: 2.35−6.0 V` Fixed 1.8-V, 2.5-V, 2.8-V, 3.0-V, 3.3-V, 5.0-V, orAdjustable Output Voltage Options` Low 120-mV Dropout at 300-mA Load` Guaranteed 300-mA Output Current`...

Si91821 Data Sheet

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Part Number:
Si91821
Supply Ability:
5000

Price Break

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

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Product Details

Description



Features:

` Input Voltage: 2.35−6.0 V
` Fixed 1.8-V, 2.5-V, 2.8-V, 3.0-V, 3.3-V, 5.0-V, or
Adjustable Output Voltage Options
` Low 120-mV Dropout at 300-mA Load
` Guaranteed 300-mA Output Current
` 500-mA Peak Output Current Capability
` Uses Low ESR Ceramic Output Capacitor
` Fast Load and Line Transient Response
` Only 100-V(rms) Noise With Noise Bypass
Capacitor
` 1-A Maximum Shutdown Current
` Built-in Short Circuit and Thermal Protection
` Out-Of-Regulation Error Flag (Power_Good)




Application

· Cellular Phones
· Laptop and Palm Computers
· PDA, Digital Still Cameras




Specifications

Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5 V
SDInput Voltage, VSD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to VIN
Output Current, IOUT . . . . . . . . . . . . . . . . . . . . . . . . . . Short Circuit Protected
Output Voltage, VOUT . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to VO(nom) + 0.3 V
Maximum Junction Temperature, TJ(max) . . . . . . . . . . . . . . . . . . . . . . . 150
Storage Temperature, TSTG . . . . . . . . . . . . . . . . . . . . . . . . . . −55C to 150
ESD (Human Body Model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV
Power Dissipation (Package)a
8-Pin MSOPb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 666 mW
Thermal Impedance (JA)a
8-Pin MSOPb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185/W
Notes
a. Device mounted with all leads soldered or welded to PC board.
b. Derate 10 mW/ above TA = 25




Description

The Si91821 is a 300-mA CMOS LDO (low dropout) voltage regulator. The device features ultra low ground current and dropout voltage to prolong battery life in portable electronics.

The Si91821 offers line and load transient response and ripple rejection superior to that of bipolar or BiCMOS LDO regulators.

The device is designed to maintain regulation while delivering 500-mA peak current. This is useful for systems that have high surge current upon turn-on. The Si91821 is designed to drive the lower cost ceramic, as well as tantalum, output capacitors.

The device is guaranteed stable from maximum load current down to 0-mA load. In addition, an external noise bypass capacitor connected to the device's CNOISE pin will lower the LDO's output noise for low noise applications.The Si91821 also includes an out-of-regulation error flag. When the output voltage is 5% below its nominal output voltage, the error flag output goes low.

The Si91821 is available in both standard and lead (Pb)-free MSOP-8 packages and is specified to operate over the industrial temperature range of −40 to 85 .






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