78ST212SERIES

更新时间： 2024-11-01 23:24:47

品牌	Logo	应用领域
德州仪器 - TI		稳压器开关放大器
页数	文件大小	规格书
3页	189K
描述
12V 2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR

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中文翻译

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数据手册

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78ST212SERIES 数据手册

For assistance or to order, call (800) 531-5782

7 8 S T 2 1 2 S e r i e s

12V 2 AMP POSITIVE STEP-DOWN

INTEGRATED SWITCHING REGULATOR

Revised 6/30/98

• High Efficiency > 87%

• Wide Input Range

The 78ST212 is a series of wide

input voltage, 3-terminal Integrated

Switching Regulators (ISRs). With a

surge capability of 3A and an output

voltage that is laser trimmed, it is ideal

for inductive load applications such as

disk drive motors.

• Aluminum Heatsink for

Applications with Airflow

• Self-Contained Inductor

• Short Circuit Protection

• Over-Temperature Protection

Pin-Out Information

Ordering Information

78ST2 XX Y C

Pin Function

V_in

GND

V_out

Standard Application

Output Voltage

Package Suffix

12 = 12.0 Volts

V = Vertical Mount

H = Horizontal Mount

Vin

Vout

GND

78ST212

GND

(For dimensions and PC board

layout see Package Style 600.)

C₁= Optional 1µF ceramic

C₂= Required 100µF electrolytic

Specifications

78ST212 SERIES

Characteristics

(T_a= 25°C unless noted)

Symbols

Conditions

Min

Typ

Max

Units

Output Current

I_o

Over V_inrange

With forced air cooling

0.1*

—

2.0

Input Voltage Range

Output Voltage Tolerance

V_in

∆V_o

0.1 ≤ I_o≤ 2.0A

Over V_inrange, I_o= 2.0A

T_a= 0°C to +55°C

14.5

—

±1.0

±2.0

%Vo

Line Regulation

Load Regulation

V_oRipple/Noise

Reg_line

Regload

V_n

Over V_inrange

—

±0.4

±0.2

1.0

±0.8

±0.4

—

%V_o

0.1 ≤ I_o≤ 2.0A

V_in=17V, I_o=2.0A, V_o=12V

Transient Response

(with 100µF output cap)

t_tr

50% load change

V_oover/undershoot

—

100

3.0

—

µSec

%V_o

Efficiency

V_in=17V, I_o=2.0A

Over V_inand I_oranges

—

1.0

—

Switching Frequency

ƒ_o

T_a

0.95

-40

1.05

+65

MHz

°C

Absolute Maximum

Operating Temperature Range

Recommended Operating

Temperature Range

T_a

Free Air Convection, (40-60LFM)

at V_in= 24V, I_o=2A

-40

—

+55**

°C

Thermal Resistance

Storage Temperature

Mechanical Shock

θja

T_s

—

Free Air Convection, (40-60LFM)

—

°C/W

°C

-40

—

+125

—

Per Mil-STD-883D, Method 2002.3

500

G’s

Mechanical Vibration

Per Mil-STD-883D, Method 2007.2,

20-2000 Hz, Soldered in a PC board

—

G’s

Weight

—

Grams

*ISR will operate down to no load with reduced specifications.

**See Thermal Derating chart.

Note: The 78ST212 Series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.

Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com

12 3

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与78ST212SERIES相关器件

型号	品牌	获取价格	描述	数据表
78ST212VC	TI	获取价格	12V 2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR
78ST233	TI	获取价格	2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR
78ST233HC	TI	获取价格	2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR
78ST233SC	TI	获取价格	2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR
78ST233VC	TI	获取价格	2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR
78ST235	TI	获取价格	3.45Vout 2A Wide Input Positive Step-Down ISR
78ST235HC	TI	获取价格	2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR
78ST235SC	TI	获取价格	2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR
78ST235VC	TI	获取价格	2 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR
78ST300	TI	获取价格	3 AMP POSITIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR

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