Cherry Semiconductor CS8120YTVA5, CS8120YTHA5, CS8120YT5, CS8120YN8, CS8120YDR14 Datasheet

1

Features

■

5V ± 4% Output Voltage

300mA

■ Low Dropout Voltage

(1V @ 150mA)

■ Low Quiescent Current

(2.5mA @ I

OUT

= 150mA)

■ µP Compatible Control

Functions

■ Low Current Sleep Mode

IQ=250µA

■ Fault Protection

Thermal Shutdown
Short Circuit
60V Load Dump

ENABLE

RESET

Package Options

5 Lead TO-220

Tab (Gnd)

14 Lead SOIC

Narrow

8 Lead PDIP

CS8120

5V, 300mA Linear Regulator with

and

ENABLE

RESET

1

CS8120

Description

The CS8120 is a 5V, 300mA precision
linear regulator with two microproces­sor compatible control functions and
protection circuitry included on chip.
The composite NPN-PNP output pass
transistor assures a lower dropout volt­age (1V @ 200mA) without requiring
excessive supply current (2.5mA).

The CS8120Õs two logic control func­tions make this regulator well suited to
applications requiring microprocessor­based control at the board or module
level. controls the output
stage. A high voltage (>2.9V) on the

lead turns off the regula­torÕs pass transistor and sends the IC
into Sleep mode where it draws only
250µA. The function sends a

signal when the IC is power­ing up or whenever the output voltage
moves out of regulation. The
signal is valid down to V

OUT

= 1V.

The CS8120 design optimizes supply
rejection by switching the internal
bandgap reference from the supply
input to the regulator output as soon as
the nominal output voltage is achieved.
Additional on chip filtering enhances
rejection of high frequency transients
on all external leads.

The CS8120 is fault protected against
short circuit, over voltage and thermal
runaway conditions.

RESET

RESET

RESET

ENABLE

ENABLE

Block Diagram *

V

IN

SENSE

NC

V

OUT

Gnd

NC

NC

NC

NC

NC

NC

NC

RESET

ENABLE

V

IN

ENABLE

Gnd

RESET

V

OUT

SENSE

NC

NC

1V

IN

2
3 Gnd
4
5V

OUT

RESET

ENABLE

* TO-220 Block Diagram

1

5 Lead D2 PAK

Rev. 2/3/98

Cherry Semiconductor Corporation

2000 South County Trail, East Greenwich, RI 02818

Tel: [phone] Fax: [phone]

Email: [e-mail]

Web Site: www.cherry-semi.com

A Company

¨

ENABLE

V

IN

ENABLE

-

Comparator

+

V

REF

TO V

Bandgap

Supply

OUT

Over

Voltage

Shutdown

Thermal

Shutdown

Bandgap

Reference

+

-

Error

Amplifier

Output

Current

Limit

V

OUT

1

1

RESET

RESET

Comparator

+

-

Gnd

2

Electrical Characteristics: V

IN

= 14V, I

OUT

=5 mA, -40ûC ² TJ ² 150ûC, -40ûC ² TC ² 125ûC unless otherwise specified

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

CS8120

Absolute Maximum Ratings

DC Input Voltage ...........................................................................................................................................................-0.7 to 26V

Load Dump .................................................................................................................................................................................60V

Output Current .................................................................................................................................................Internally Limited

Electrostatic Discharge (Human Body Model)......................................................................................................................2kV

Operating Temperature .......................................................................................................................................-40¡C to +125¡C

Junction Temperature...........................................................................................................................................-40¡C to +150¡C

Storage Temperature ............................................................................................................................................-55¡C to +150¡C

Lead Temperature Soldering

Wave Solder (through hole styles only) .....................................................................................10 sec. max, 260¡C peak

Reflow (SMD styles only) ......................................................................................60 sec. max above 183¡C, 230¡C peak

* To have safe operating junction temperatures, low duty cycle pulse testing is used on tests where applicable.

■ Output Stage

Output Voltage, V

OUT

7V ² V

IN

² 26V, 1mA ² I

OUT

² 300mA 4.8 5.0 5.2 V

Line Regulation 7V ² V

IN

² 26V, I

OUT

= 200mA 50 mV

Load Regulation 1mA ² I

OUT

² 300mA 50 mV

Supply Voltage Rejection V

IN

= 14VDC + 1

VRMS

40 70 dB

@120Hz, I

LOAD

= 25½

Dropout Voltage I

OUT

= 200mA 1.0 1.5 V

Quiescent Current = High, V

IN

= 12V 0.25 0.65 mA

= Low, I

OUT

= 200mA 2.5 15.0 mA

■ Protection Circuits

Short Circuit Current 300 600 mA
Thermal Shutdown 150 190 ûC
Overvoltage Shutdown 26 40 V

■

Saturation Voltage 1V < V

OUT

< V

RT(OFF)

, 3.1k½ pull-up 0.1 0.4 V

to V

OUT

Output Leakage = Low 0 25 µA

Current V

OUT

> V

RT(ON)

, V = V

OUT

Power ON/OFF 3.1k½ pull-up to V

OUT

0.7 1.0 V

Peak Output Voltage

Threshold ON V

OUT

- 0.10 V

OUT

- 0.04 V

(V

OUT

Increasing)

Threshold OFF 4.75 V

OUT

- 0.14 V

(V

OUT

Decreasing)

Threshold Hysteresis 10 40 mV

■

Input High Voltage 7V < V

IN

< 26V 2.9 3.9 V

Input Low Voltage 7V < V

IN

< 26V 1.1 2.1 V

Input Hysteresis 7V < V

IN

< 26V 0.4 0.8 2.8 V

Input Current Gnd < V

IN(HI)

< V

OUT

-10 0 +10 µA

ENABLE

RESET

RESET

RESET

RESET

RESET

ENABLERESET

RESET

RESET

ENABLE

ENABLE

Load Regulation vs. Output Current Over Temperature

5.02

5.01

5

4.99

4.98

4.97

4.96

4.95

-40 -20 0 20 40 60 80 100 120 140 150

Junction Temperature (°C)

V

OUT

(V)

5.00V @25°C

I

OUT

= 100mA

Output Voltage vs. Temperature

0

-10
0 50 100 150 200 250 300 350 400 450 500

10

20

30

40

50

-40° C

125° C

I

OUT

(mA)

Line Reg. (mV)

25°C

V

IN

= 7 to 25V

Line Regulation vs. Output Current Over Temperature

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0
0

Output Current (mA)

Dropout Voltage (V)

-40°C

25°C

125°C

50 100

350

150

200 250 300

Dropout Voltage vs. Output Current Over Temperature

3

CS8120

Typical Performance Characteristics

Package Lead Description

PACKAGE LEAD # LEAD SYMBOL FUNCTION

5 Lead 8 Lead 14 Lead SO 5 Lead D

2

TO-220 PDIP Narrow PAK

12 1 1 VINSupply voltage to IC, usually direct from the battery.

2 4 5 2 CMOS compatible logical input. V

OUT

is disabled i.e.

placed in a high impedance state when is high.

3 8 13 3 Gnd Ground connection.

4 6 10 4 CMOS compatible output lead. goes low when-

ever V

OUT

falls out of regulation. The delay is

externally programmed.

51 14 5 V

OUT

Regulated output voltage, 5V (typ).

N/A 7 12 SENSE Kelvin Connection which allows remote sensing of out-

put voltage for improved regulation. If remote sensing is
not desired, connect to V

OUT

.

3, 5 2,3,4, NC No connection

6,7,8,9,11

RESET

RESET

RESET

ENABLE

ENABLE

0

-40° C

25° C

-10

-15

-5

VIN =14V

125° C

-20

-25

-30

Load Reg. (mV)

-35

-40

-45

-50
0 100 200 300 400 500

I

(mA)

OUT