Datasheet > PT78NR252

PT78NR252

更新时间： 2024-09-16 02:58:43

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
2页	62K
描述
Negative output from positive input

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PT78NR252 数据手册

PT78NR200 Series

10-12W Plus to Minus Voltage

Integrated Switching Regulator

SLTS074A

(Revised 6/30/2000)

•

Negative output from positive input

Wide Input Range

Self-Contained Inductor

Short Circuit Protection

Over-Temperature Protection

Fast Transient Response

tive input voltage greater than 9V.

These easy-to-use, 3-terminal, Inte-

grated Switching Regulators (ISRs)

have maximum output power of 10 to

12 watts and a negative output voltage

that is laser trimmed. They also have

excellent line and load regulation.

The PT78NR200 requires 100

LFM of airflow at its maximum

output current.

The PT78NR200 series creates

negative output voltage from a posi-

Pin-Out Information

Ordering Information

PT78NR2 XX

Pin Function

Standard Application

-V_out

Output Voltage

Package Suffix

GND

52 = -5.2 Volts

06 = -6.0 Volts

12 = -12.0 Volts

15 = -15.0 Volts

H = Horizontal Mount

S = Surface Mount

V = Vertical Mount

Vin

-Vout

COM

PT78NR200

COM

(For dimensions and PC board layout, see

Package Styles 600 and 610.)

C1 = Required 100µF electrolytic

C2 = Required 100µF electrolytic

Pkg Style 600

Specifications

PT78NR200 SERIES

Characteristics

(T_a= 25°C unless noted)

Symbols

Conditions

Min

Typ

Max

Units

Output Current

I_o

Over V_inrange

V_o= -5.2V

0.1*

—

2.0

1.0

V_o= -12.0V

Short Circuit Current

Inrush Current

I_sc

V_in=10V

—

4×I_max

—

Apk

I_ir

t_ir

V_in=10V

—

On start-up

0.5

mSec

Input Voltage Range

V_in

0.1 ≤ I_o≤ I_max

—

Output Voltage Tolerance

∆V_o

Over V_inrange

—

1.0

3.0

%V^o

T_a= 0°C to +70°C

Over V_inrange

0.3 ≤ I_o≤ I_max

Line Regulation

Load Regulation

V_oRipple/Noise

Reg_line

Reg_load

V_n

—

0.5

1.0

—

%V_o

V_in=10V, I_o=I_max

Transient Response

(with 100µF output cap)

t_tr

50% load change

V_oover/undershoot

—

100

5.0

250

—

µSec

%V_o

Efficiency

V_in=9V, I_o=0.5×I_max, V_o=-12V

—

Switching Frequency

ƒ_o

T_a

Over V_inand I_oranges600

650

700

kHz

Absolute Maximum

Operating Temperaturte Range

100 LFM airflow

Over V_inand I_oRanges

—

+85

°C

Recommended Operating

Temperature Range

T_a

100 LFM airflow

Over V_inand I_oRanges

+60**

Thermal Resistance

Storage Temperature

Mechanical Shock

θ_ja

T_s

—

100 LFM airflow

—

°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 PT78NR200 series requires a 100µF electrolytic or tantalum output capacitor for proper operation in all applications.

For technical support and more information, see inside back cover or visit www.ti.com/powertrends

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与PT78NR252相关器件

型号	品牌	获取价格	描述	数据表
PT78NR252H	TI	获取价格	10-12W Plus to Minus Voltage Integrated Switching Regulator
PT78NR252S	TI	获取价格	10-12W Plus to Minus Voltage Integrated Switching Regulator
PT78NR252ST	TI	获取价格	2A SWITCHING REGULATOR, 700kHz SWITCHING FREQ-MAX, SMA3, SMT-3
PT78NR252V	TI	获取价格	10-12W Plus to Minus Voltage Integrated Switching Regulator
PT78SR105H	TI	获取价格	-1.5 AMP NEGATIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR
PT78SR105S	TI	获取价格	-1.5 AMP NEGATIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR
PT78SR105V	TI	获取价格	-1.5 AMP NEGATIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR
PT78SR108H	TI	获取价格	-1.5 AMP NEGATIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR
PT78SR108S	TI	获取价格	-1.5 AMP NEGATIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR
PT78SR108V	TI	获取价格	-1.5 AMP NEGATIVE STEP-DOWN INTEGRATED SWITCHING REGULATOR

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