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參數資料
| 型號： | TC2574-VOETR |
| 元件分類： | 穩壓器 |
| 英文描述： | 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | SOIC-16 |
| 文件頁數： | 1/26頁 |
| 文件大小： | 221K |
| 代理商： | TC2574-VOETR |
TC2574-2 12/22/00
TC2574
2001 Microchip Technology Inc.
DS21397A
0.5A Step-Down Switching Regulator
GENERAL DESCRIPTION
The TC2574 series of regulators are monolithic inte-
grated circuits ideally suited for easy and convenient design
of a step-down switching regulator (buck converter). All
circuits of this series are capable of driving a 0.5A load with
excellent line and load regulation. These devices are avail-
able in fixed output voltages of 3.3V, 5.0V, 12V and
an adjustable output version.
These regulators were designed to minimize the num-
ber of external components to simplify the power supply
design. Standard series of inductors optimized for use with
the TC2574 are offered by several different inductor manu-
facturers.
Since the TC2574 converter is a switch–mode power
supply, its efficiency is significantly higher in comparison
with popular three-terminal linear regulators, especially with
higher input voltages. In most cases, the power dissipated
by the TC2574 regulator is so low, that the copper traces on
the printed circuit board are normally the only heatsink
needed and no additional heatsinking is required.
The TC2574 features include a guaranteed
±4% toler-
ance on output voltage within specified input voltages and
output load conditions, and
±10% on the oscillator frequency
(
±2% over 0°C to +125°C). External shutdown is included,
featuring 60
A (typical) standby current. The output switch
includes cycle–by–cycle current limiting, as well as thermal
shutdown for full protection under fault conditions.
FEATURES
s
3.3V, 5.0V, 12V and Adjustable Output Versions
s
Adjustable Version Output Voltage Range,
1.23 to 37 V
±4% Max Over Line and Load Conditions
s
Guaranteed 0.5 A Output Current
s
Wide Input Voltage Range: 4.75 to 40V
s
Requires Only 4 External Components
s
52kHz Fixed Frequency Internal Oscillator
s
TTL Shutdown Capability, Low Power Standby Mode
s
High Efficiency
s
Uses Readily Available Standard Inductors
s
Thermal Shutdown and Current Limit Protection
APPLICATIONS
s
Simple and High–Efficiency Step–Down (Buck)
Regulator
s
Efficient Pre-Regulator for Linear Regulators
s
On–Card Switching Regulators
s
Positive to Negative Converters (Buck–Boost)
s
Negative Step-Up Converters
s
Power Supply for Battery Chargers
ORDERING INFORMATION
Part
Temperature
Number
Package
Range
TC2574-3.3VPA
8-Pin PDIP (Narrow) –40 to +125
°C
TC2574-5.0VPA
8-Pin PDIP (Narrow) –40 to +125
°C
TC2574-12.0VPA
8-Pin PDIP (Narrow) –40 to +125
°C
TC2574-VPA*
8-Pin PDIP (Narrow) –40 to +125
°C
TC2574-VOE*
16-Pin SOIC (Wide)
–40 to +125
°C
PIN CONFIGURATIONS
1
2
3
4
16
15
14
13
SIG GND
5
6
7
12
11
10
9
8
FB
NC
OUTPUT
TC2574
NC
PWR GND
ON/OFF
1
8
2
7
3
6
4
5
SIG GND
FB
OUTPUT
VIN
NC
PWR GND
TC2574
ON/OFF
16-Pin SOIC (Wide)
8-Pin PDIP (Narrow)
Note: *ADJ = 1.23 To 37V.
相關PDF資料 |
PDF描述 |
|---|---|
| TC2576VAT | 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSFM5 |
| TC2576-3.3VAT | 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSFM5 |
| TC2576-12.0VAT | 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSFM5 |
| TC276-40 | SPECIALTY ANALOG CIRCUIT, CDIP20 |
| TC276-20 | SPECIALTY ANALOG CIRCUIT, CDIP20 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TC2574VPA | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TC2574-VPA | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:0.5A Step-Down Switching Regulator |
| TC2575 | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:1.0A Step-Down Switching Regulator |
| TC2575-12.0VAT | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:1.0A Step-Down Switching Regulator |
| TC2575-3.3VAT | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:1.0A Step-Down Switching Regulator |
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