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TC120

Status: End of Life

Features:

  • •Internal Switching Transistor •Supports 600mA Output Current •External Switching Transistor Control for Output Currents of 2A+ 300 KHz •Oscillator Frequency Supports Small Inductor Size •Short Circuit Protection •Built-In Undervoltage Lockout •High (95%, Typ) Efficiency •Automatic Switchover to Current-Saving PFM Mode at Low Output Loads •Automatic Output Capacitor Discharge While in Shutdown •Programmable Soft-Start Time •Power-Saving Shutdown Mode
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Overview
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RoHS Information
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Device Overview

Summary

TC120 is a 300 KHz PFM/PWM step-down (Buck) DC/DC regulator/controller combination for use in systems operating from two or more cells, or in line-powered applications. It uses PWM as the primary modulation scheme, but automatically converts to PFM at low output loads for greater efficiency. It requires only an external inductor, Schottky diode, and two capacitors to implement a step-down converter having a maximum output current of 600 mA (VIN =5V, VOUT = 3.3V). An external switching transistor (P-channel MOSFET) can be added to increase output current capability to support output loads of 2A or more. The TC120 consumes only 55µA (max) of supply current (VOUT = 3.3V) and can be placed in shutdown mode by bringing the shutdown input (SHDN) low. During shutdown, the regulator is disabled, supply current is reduced to 2.5 µA(max), and VOUT is internally pulled to ground, discharging the output capacitor. Normal operation resumes when SHDN is brought high. Other features include a built-in undervoltage lockout (UVLO), an externally programmable soft start time, and output short circuit protection. The TC120 operates from a maximum input voltage of 10V and is available in a low-profile 8-Pin SOP package.

Additional Features
  • Internal Switching Transistor
  • Supports 600mA Output Current
  • External Switching Transistor Control for Output Currents of 2A+ 300 KHz
  • Oscillator Frequency Supports Small Inductor Size
  • Short Circuit Protection
  • Built-In Undervoltage Lockout
  • High (95%, Typ) Efficiency
  • Automatic Switchover to Current-Saving PFM Mode at Low Output Loads
  • Automatic Output Capacitor Discharge While in Shutdown
  • Programmable Soft-Start Time
  • Power-Saving Shutdown Mode

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
TC120303EHATR
0.700000
8
SOP
4.4mm
Matte Tin
e3
TC120503EHATR
0.700000
8
SOP
4.4mm
Matte Tin
e3
TC120333EHATR
0.700000
8
SOP
4.4mm
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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