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MAS9251

Features: • Two versions: Adjustable Output Fixed 5 V Output• Solution without Inductors• Soft-Start• Output Accuracy < ± 4%• Low External Part Count• Low Noise• Input Voltage Range: 2.7 V. 4.5 V• Shutdown Control• 1 MHz Switching Frequency&...

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SeekIC No. : 004408301 Detail

MAS9251: Features: • Two versions: Adjustable Output Fixed 5 V Output• Solution without Inductors• Soft-Start• Output Accuracy < ± 4%• Low External Part Count• Low Nois...

MAS9251 Data Sheet

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Part Number:
MAS9251
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: 2024/11/27

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Product Details

Description



Features:

• Two versions: Adjustable Output Fixed 5 V Output
• Solution without Inductors
• Soft-Start
• Output Accuracy < ± 4%
• Low External Part Count
• Low Noise
• Input Voltage Range: 2.7 V. 4.5 V
• Shutdown Control
• 1 MHz Switching Frequency
• Internal Thermal Shutdown
• Short Circuit Protection
• MSOP-8 and CSP Packages


Application

• LED Backlighting
• White LED Driver
• LED Brightness Control
• Li-Ion Battery Backup Supplies
• Local 3 V to 5 V Conversion
• Smart Card Readers
• PCMCIA Local 5 V Supplies


Pinout

Connection Diagram


Specifications

Parameter
Symbol
Conditions
Min
Max
Unit
Supply Voltage
VIN
-0.3
6
V
Output Voltage
VOUT
-0.3
6
V
CTRL and FB Input Voltages
VCTRL, VFB
VIN 5.7 V
5.7 V < VIN 6 V
-0.3
VIN + 0.3
6
V
ESD Rating
Human Body Model (HBM)
2
kV
Junction Temperature
TJmax
+175
(limited)
°C
Storage Temperature
TS
-55
+150
°C
Short Circuit Duration
tSC
Indefinite
S
Stresses beyond those listed may cause permanent damage to the device. The device may not operate under these conditions, but
it will not be destroyed.


Description

MAS9251 is a low noise, constant frequency switched capacitor voltage doubler with regulated output. In the adjustable output version an external feedback pin allows the output voltage to be adjusted.

The high switching frequency of MAS9251 guarantees low output ripple even with small ceramic capacitors. The shutdown control pin can be used to turn off the device for power saving. MAS9251 is equipped with soft-start feature, which reduces the circuit's disturbance to power supply lines during start-up by limiting the maximum input current.

Low operating input voltage and low external part count make MAS9251 ideal for small battery powered portable systems. An internal thermal protection circuit prevents the device from overheating. Also the maximum output current is internally limited.




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