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NCP1550

Features: • Pb−Free Packages are Available• High Efficiency 92%, Typical• Low Quiescent Bias Current of 50 A (Typical at PFM Mode with No Load)• Output Voltage Options from 1.8 V to 3.3 V with High Accuracy -2.0%• Low Output Voltage Ripple, 50 mV, Typical•...

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SeekIC No. : 004432977 Detail

NCP1550: Features: • Pb−Free Packages are Available• High Efficiency 92%, Typical• Low Quiescent Bias Current of 50 A (Typical at PFM Mode with No Load)• Output Voltage Options...

NCP1550 Data Sheet

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Part Number:
NCP1550
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:

• Pb−Free Packages are Available
• High Efficiency 92%, Typical
• Low Quiescent Bias Current of 50 A (Typical at PFM Mode with No Load)
• Output Voltage Options from 1.8 V to 3.3 V with High Accuracy -2.0%
• Low Output Voltage Ripple, 50 mV, Typical
• PWM Switching Frequency at 600 kHz
• Automatic PWM/PFM Switchover at Light Load Condition
• Very Low Dropout Operation, 100% Max. Duty Cycle
• Chip Enable Pin with On−Chip 150 nA Pullup Current Source
• Low Shutdown Current, 0.3 A, Typical
• Input Voltage Range from 2.45 V to 5.5 V
• Built−in Soft−Start
• Internal Undervoltage Lockout (UVLO) Protection
• Low Profile and Minimum External Components
• Micro Miniature TSOP−5 Package


Application

• Personal Digital Assistant (PDA)
• Camcorders and Digital Still Camera
• Hand−Held Instrument
• Distributed Power System
• Computer Peripheral
• Conversion from Four NiMH or NiCd or One Lithium−ion Cells to 3.3 V/1.8 V


Pinout

Connection Diagram


Specifications

Rating Symbol Value Unit
Device Power Supply, VIN (Pin 5) VIN −0.3 to 6.0 V
Input/Output Pins
CE (Pin 1)
VOUT (Pin 3)
EXT (Pin 4)		 VCE
VOUT
VEXT		 −0.3 to 6.0
−0.3 to 6.0
−0.3 to 6.0		 V
Thermal Characteristics
TSOP−5 Plastic Package, Case 483−01
Thermal Resistance, Junction−to−Air		 RJA 250 °C/W
Operating Junction Temperature Range TJ −40 to 125 °C
Operating Ambient Temperature Range TA −40 to +85 °C
Storage Temperature Range Tstg −55 to +150 °C
NOTE: ESD data available upon request.
1. This device series contains ESD protection and exceeds the following tests: Human Body Model (HBM) 2.0 kV per JEDEC standard: JESD22−A114. Machine Model (MM) 200V per JEDEC standard: JESD22−A115.
2. Latchup Current Maximum Rating: 150 mA per JEDEC standard: JESD78.
3. Moisture Sensitivity Level (MSL): 1 per IPC/JEDEC standard: J−STD−020A.


Description

The NCP1550 is a monolithic micropower high frequency voltage mode step−down controller IC, specially designed for battery operated hand−held electronic products. With appropriate external P−type MOSFET, the device can provide up to 2.0 A loading current with high conversion efficiency. The device operates in Constant−Frequency PWM mode at normal operation, that ensures low output ripple noise, and which will automatically switch to PFM mode at low output loads for higher efficiency. Additionally, value−added features of Chip Enable to reduce IC Off−State current and integrated feedback resistor network, make it the best choice for portable applications. The device is designed to operate for voltage regulation with minimum external components and board space. This NCP1550 is available in a TSOP−5 package with six standard output voltage options.




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