Microchip logo
  • All
  • Products
  • Documents
  • Applications Notes
product primary image

TC170

EOL

Status: End of Life

Features:

  • Low Supply Current With CMOS Technology..........................3.8mA Max Internal Reference .........................5.1V Fast Rise/Fall Times (CL = 1000pF) ......50nsec Dual Push-Pull Outputs Direct-Power MOSFET Drive High Totem-Pole Output Drive ............300mA Differential Current-Sense Amplifier Programmable Current Limit Soft-Start Operation Double-Pulse Suppression Undervoltage Lockout Wide Supply Voltage Operation ...........8V to 16V High Frequency Operation ................ 200kHz Available with Low OFF State Outputs Low Power, Pin-Compatible Replacement for UC3846
View More
Overview
Documents
Development Environment
Similar Devices
RoHS Information
Add to Cart

Device Overview

Summary

The TC170 brings low-power CMOS technology to the current-mode-switching power supply controller market. Maximum supply current is 3.8 mA.Bipolar current-mode control integrated circuits require five times more operating current. The dual totem-pole CMOS outputs drive power MOSFETs or bipolar transistors.The 50nsec typical output rise and fall times (1000pF capacitive loads)minimize MOSFET power dissipation.Output peak current is 300mA. The TC170 contains a full array of system-protection circuits (see features). Current-mode control lets users parallel power supply modules.Two or more TC170 controllers can be slaved together for parallel operation.Circuits can operate from a master TC170 internal oscillator or an external system oscillator. The TC170 operates from an 8V to 16V power supply. An internal 2%,5.1V reference minimizes external component count.The TC170 is pin compatible with the Unitrode UC1846/2846/3846 bipolar controller. Other advantages inherent in current-mode control include superior line and load regulation and automatic symmetry correction in push-pull converters.

Additional Features
Low Supply Current With CMOS Technology..........................3.8mA Max
Internal Reference .........................5.1V
Fast Rise/Fall Times (CL = 1000pF) ......50nsec
Dual Push-Pull Outputs
Direct-Power MOSFET Drive
High Totem-Pole Output Drive ............300mA
Differential Current-Sense Amplifier
Programmable Current Limit
Soft-Start Operation
Double-Pulse Suppression
Undervoltage Lockout
Wide Supply Voltage Operation ...........8V to 16V
High Frequency Operation ................ 200kHz
Available with Low OFF State Outputs
Low Power, Pin-Compatible Replacement for UC3846

Documents

Jump to:

Development tools data is currently unavailable.

Similar Devices

Product
Resolution
Vref
Price 5K
8
External,VDD
$0.55
10
External
$0.60
12
External
$0.70
12
External
$0.74
12
Internal,VDD
$1.37
6
External
$0.44
8
Internal,VDD,External
$0.67
8
Internal,VDD,External
$1.04
10
Internal,VDD,External
$0.88
10
Internal,VDD,External
$1.45
12
Internal,VDD,External
$1.24
12
Internal,VDD,External
$2.02
8
Internal,VDD,External
$0.56
8
Internal,VDD,External
$0.92
10
Internal,VDD,External
$0.77
10
Internal,VDD,External
$1.26
12
Internal,VDD,External
$1.12
12
Internal,VDD,External
$1.85
6
External,VDD
$0.51
8
Internal,VDD,External
$0.63
8
Internal,VDD,External
$0.99
8
Internal,VDD,External
 
8
Internal,VDD,External
$2.61
10
Internal,VDD,External
$0.78
10
Internal,VDD,External
$1.34
10
Internal,VDD,External
 
10
Internal,VDD,External
$4.27
12
Internal,VDD,External
$1.08
12
Internal,VDD,External
$1.87
12
Internal,VDD,External
 
12
Internal,VDD,External
$6.98
8
Internal,VDD,External
$0.51
8
Internal,VDD,External
$0.88
8
Internal,VDD,External
 
8
Internal,VDD,External
$2.59
10
Internal,VDD,External
$0.67
10
Internal,VDD,External
$1.17
10
Internal,VDD,External
 
10
Internal,VDD,External
$4.24
12
Internal,VDD,External
$0.99
12
Internal,VDD,External
$1.71
12
Internal,VDD,External
 
12
Internal,VDD,External
$6.96
8
Internal
$0.86
8
Internal
$1.07
10
Internal
$1.23
10
Internal
$1.53
12
Internal
$1.71
12
Internal
$2.17
8
Internal,VDD,External
$0.67
8
Internal,VDD,External
$1.04
10
Internal,VDD,External
$0.88
10
Internal,VDD,External
$1.45
12
Internal,VDD,External
$1.24
12
Internal,VDD,External
$2.02
8
Internal,VDD,External
$0.56
8
Internal,VDD,External
$0.92
10
Internal,VDD,External
$0.77
10
Internal,VDD,External
$1.26
12
Internal,VDD,External
$1.12
12
Internal,VDD,External
$1.85
8
Internal,VDD,External
$0.63
8
Internal,VDD,External
$0.99
8
Internal,VDD,External
 
8
Internal,VDD,External
$2.61
10
Internal,VDD,External
$0.78
10
Internal,VDD,External
$1.34
10
Internal,VDD,External
 
10
Internal,VDD,External
$4.27
12
Internal,VDD,External
$1.08
12
Internal,VDD,External
$1.87
12
Internal,VDD,External
 
12
Internal,VDD,External
$6.98
8
Internal,VDD,External
$0.51
8
Internal,VDD,External
$0.88
8
Internal,VDD,External
 
8
Internal,VDD,External
$2.59
10
Internal,VDD,External
$0.67
10
Internal,VDD,External
$1.17
10
Internal,VDD,External
 
10
Internal,VDD,External
$4.24
12
Internal,VDD,External
$0.99
12
Internal,VDD,External
$1.71
12
Internal,VDD,External
 
12
Internal,VDD,External
$6.96
8
External
$0.74
8
External
$0.98
10
External
$1.05
10
External
$1.33
12
External
$1.43
12
External
$1.90
8
External
$0.99
10
External
$1.28

Rohs data is currently unavailable.

Buy from Microchip

Grid
View
Table
View
Filter:
Apply
Clear
Only show products with samples
Product
Leads
Package Type
Temp Range
Packing Media
5K Pricing
Buy