TS2937CW12RP [TSC]

500mA Ultra Low Dropout Voltage Regulator;


型号：	TS2937CW12RP
厂家：	TAIWAN SEMICONDUCTOR COMPANY, LTD
描述：	500mA Ultra Low Dropout Voltage Regulator 输出元件调节器
文件：	总10页 (文件大小：318K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

TS2937

500mA Ultra Low Dropout Voltage Regulator

TO-220

TO-263

TO-252

(DPAK)

SOT-223

Pin Definition:

1. Input

(D²PAK)

2. Ground

3. Output

General Description

TS2937 of fixed-voltage monolithic micro-power voltage regulators is designed for a wide range of applications.

This device excellent choice of use in battery-power application. Furthermore, the quiescent current increases on

slightly at dropout, which prolongs battery life. This series of fixed-voltage regulators features very low ground

current (200uA Typ.) and very low drop output voltage (Typ. 60mV at light load and 600mV at 500mA). This

includes a tight initial tolerance of 2%, extremely good line regulation of 0.05% typ., and very low output

temperature coefficient.

Features

Ordering Information

●

Dropout voltage typically 0.6V @ Io=500mA

Part No.

Package

Packing

50pcs / Tube

Output voltage trimmed before assembly

-18V Reverse peak voltage

TS2937CZxx C0

TS2937CMxx RN

TS2937CPxx RO

TS2937CWxx RP

TO-220

TO-263

TO-252

SOT-223

800pcs / 13” Reel

2.5Kpcs / 13” Reel

+30V Input over voltage protection

+60V Transient peak voltage

Internal current limit

Note: Where xx denotes voltage option, available are

Thermal shutdown protection

12= 12V

Block Diagram

50= 5V

33= 3.3V

Contact factory for additional voltage options.

Absolute Maximum Rating

Parameter

Symbol

V_IN

Limit

-18 ~ +60

Unit

Input Supply Voltage

Operation Input Supply Voltage

Power Dissipation

V_OPR

P_D

Internally Limited

-40 ~ +125

-65 ~ +150

Operating Junction Temperature Range

Storage Temperature Range

T_J

^oC

T_STG

1/10

Version: D13

TS2937

500mA Ultra Low Dropout Voltage Regulator

Electrical Characteristics ( V_IN=V_OUT+1V, I_L=5mA, C_O=10uF, T_A=25^o

C, unless otherwise noted)

Parameter

Conditions

Min

Typ

Max

Unit

Output Voltage

0.980|Vo|

1.020|Vo|

12 / 10

5mA ≤ I_L≤ 500mA,

Vo+1V ≤ V_IN≤ 26V

5.0 / 3.3

Output Voltage

0.970|Vo|

1.030|Vo|

Input Supply Voltage

150

0.5

1.0

300

500

700

ppm/ ^oC

Output Voltage Temperature Coefficient

Line Regulation

Vo+1V ≤ V_IN≤ 26V

5mA ≤ I_L≤ 500mA

I_L=100mA

0.05

0.2

100

400

600

200

Load Regulation

Dropout Voltage (Note 4)

I_L=300mA

I_L=500mA

I_L=100uA

Quiescent Current (Note 5)

Short Circuit Current (Note 6)

I_L=300mA

I_L=500mA

V_OUT=0

1.3

C_L=2.2uF

500

350

120

Output Noise,

C_L=3.3uF

uVrms

10Hz to 100KHz, I_L=10mA

C_L=33uF

Thermal Performance

Condition

Package type

TO-220

Typ

Unit

TO-263

Thermal Resistance

Junction to Ambient

^oC/W

TO-252

150

170

SOT-223

Note 1: Absolute Maximum Rating is limits beyond which damage to the device may occur. For guaranteed

specifications and test conditions see the electrical characteristics.

Note 2: Maximum positive supply voltage of 60V must be limited duration (<100mS) and duty cycle (<1%).

Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, Tj, the

junction to ambient thermal resistance, θja, and the ambient temperature, Ta. Exceeding the maximum

allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal

shutdown. The effective value of θja can be reduced by using a heatsink.

Note 3: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its

nominal value measured at 1V differential.

Note 4: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of

the ground pin current and output load current.

Note 5: Output current will decrease with increasing temperature, but it will be not dropped below 500mA at the

maximum specified temperature.

2/10

Version: D13

TS2937

500mA Ultra Low Dropout Voltage Regulator

Application Information

The TS2937 series is a high performance with low dropout voltage regulator suitable for moderate to high current

and voltage regulator application. Its 600mV(typ) dropout voltage at full load and over temperature makes it

especially valuable in battery power systems and as high efficiency noise filters in post regulator applications.

Unlike normal NPN transistor design, where the base to emitter voltage drop and collector to emitter saturation

voltage limit the minimum dropout voltage, dropout performance of the PNP output of these devices is limited only

by low Vce saturation voltage.

The TS2937 series is fully protected from damage due to fault conditions. Linear current limiting is provided. Output

current during overload conditions is constant. Thermal shutdown the device when the die temperature exceeds

the maximum safe operating temperature. Transient protection allows device survival even when the input voltage

spikes above and below nominal. The output structure of these regulators allows voltages in excess of the desired

output voltage to be applied without reverse current flow.

Typical Application Circuit

Output Capacitor

The TS2937 series requires an output capacitor to maintain stability and improve transient response. Proper

capacitor selection is important to ensure proper operation. The output capacitor selection is dependent upon the

ESR of the output capacitor the maintain stability. When the output capacitor is 10uF or greater, the output

capacitor should have an ESR less than 2 ohm. This will improve transient response as well as promoted stability.

Ultra low ESR capacitors (<100mohm), such as ceramic chip capacitors may promote instability. These very low

ESR levels may cause an oscillation and/or under damped transient response. A low ESR solid tantalum capacitor

works extremely well and provides good transient response and stability over temperature. Aluminum electrolytic

can also be used, as long as the ESR of the capacitor is <2ohm. The value of the output capacitor can be

increased without limit. Higher capacitance values help to improved transient response and ripple rejection and

reduce output noise.

Minimum Load Current

The TS2937 series is specified between finite loads. If the output current is too small leakage currents dominate

and the output voltage rises. A 1mA minimum load current is necessary for proper regulation.

Input Capacitor

An input capacitor of 1uF or greater is recommended when the device is more that 4 inches away from the bulk AC

supply capacitance or when the supply is a battery. Small and surface mount ceramic chip capacitors can be used

for bypassing. Larger values will help to improve ripple rejection by bypassing the input to the regulator, further

improving the integrity of the output voltage.

3/10

Version: D13

TS2937

500mA Ultra Low Dropout Voltage Regulator

Application Information (Continue)

Thermal Characteristics

A heatsink may be required depending on the maximum power dissipation and maximum ambient temperature of

the application. Under all possible operating conditions, the junction temperature must be within the range specified

under absolute maximum ratings. To determine if the heatsink is required, the power dissipated by the regulator, P_D

must be calculated.

The below formula shows the voltages and currents for calculating the P_Din the regulator:

IIN = IL / IG

P_D= (V_IN-V_OUT) * I_L+ (V_IN) * I_G

Ex. P_D= (3.3V-2.5V) * 0.5A + 3.3V * 11mA

= 400mW + 36mW

= 436mW

Remark: I_Lis output load current,

I_Gis ground current.

V_INis input voltage

V_OUTis output voltage

The next parameter which must be calculated is the maximum allowable temperature rise.

TR(max) is calculated by the using to formula:

TR(max) = TJ(max) – TA(max)

Where: TJ(max) is the maximum allowable junction temperature, which is 125^oC for commercial grade parts.

T_A(max) is the maximum ambient temperature which will be encountered in the application.

Using the calculated values for TR(max) and PD, the maximum allowable value for the junction to ambient thermal

resistance, θja, can now be found:

θja = TR(max) / PD

IMPORTANT: if the maximum allowable value for is found to be ≥6 ^oC /W for the TO-220 package, ≥80^oC/W for the

TO-263 package, ≥150^oC/W for the TO-252 package, or ≥170^oC /W for the SOT-223 package, no heatsink is

needed since the package alone will dissipate enough heat to satisfy these requirements. If the calculated value for

θja falls below these limits, a heatsink is required.

4/10

Version: D13

TS2937

500mA Ultra Low Dropout Voltage Regulator

Application Information (Continue)

Figure 1 – D²PAK Thermal Resistance and Maximum Power

Dissipation vs. P.C.B Copper Length

Figure 2 – DPAK Thermal Resistance and Maximum Power

Dissipation vs. P.C.B Copper Length

Figure 3 – SOT-223 Thermal Resistance and Maximum Power

Dissipation vs. P.C.B Copper Length

5/10

Version: D13

TS2937

500mA Ultra Low Dropout Voltage Regulator

TO-220 Mechanical Drawing

Unit: Millimeters

Marking Diagram

= Year Code

= Month Code

(A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,

J=Oct, K=Nov, L=Dec)

= Lot Code

XX = Voltage Code

(3.3=3.3V, 5.0=5V, 12=12V)

6/10

Version: D13

TS2937

500mA Ultra Low Dropout Voltage Regulator

TO-263 Mechanical Drawing

Unit: Millimeters

Marking Diagram

= Year Code

= Month Code

(A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,

J=Oct, K=Nov, L=Dec)

= Lot Code

XX = Voltage Code

(3.3=3.3V, 5.0=5V, 12=12V)

7/10

Version: D13

TS2937

500mA Ultra Low Dropout Voltage Regulator

TO-252 Mechanical Drawing

Unit: Millimeters

Marking Diagram

= Year Code

= Month Code

(A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,

J=Oct, K=Nov, L=Dec)

= Lot Code

XX = Voltage Code

(3.3=3.3V, 5.0=5V, 12=12V)

8/10

Version: D13

TS2937

500mA Ultra Low Dropout Voltage Regulator

SOT-223 Mechanical Drawing

Unit: Millimeters

Marking Diagram

= Year Code

= Month Code

(A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,

J=Oct, K=Nov, L=Dec)

= Lot Code

XX = Voltage Code

(3.3=3.3V, 5.0=5V, 12=12V)

9/10

Version: D13

TS2937

500mA Ultra Low Dropout Voltage Regulator

Notice

Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf,

assumes no responsibility or liability for any errors or inaccuracies.

Information contained herein is intended to provide a product description only. No license, express or implied, to

any intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of

sale for such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty,

relating to sale and/or use of TSC products including liability or warranties relating to fitness for a particular purpose,

merchantability, or infringement of any patent, copyright, or other intellectual property right.

The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.

Customers using or selling these products for use in such applications do so at their own risk and agree to fully

indemnify TSC for any damages resulting from such improper use or sale.

10/10

Version: D13

TS2937CW12RP [TSC]

相关型号：

TS2937CW2.5

TS2937CW25

TS2937CW3.3

TS2937CW33

TS2937CW33RP

TS2937CW5

TS2937CW5.0

TS2937CW50RP

TS2937CW8

TS2937CW8.0

TS2937CWRP

TS2937CZ