SC5205-2.5CSK [SEMTECH]

Fixed Positive LDO Regulator, 2.5V, 0.3V Dropout, CMOS, PDSO5, SOT-23, 5 PIN;


型号：	SC5205-2.5CSK
厂家：	SEMTECH CORPORATION
描述：	Fixed Positive LDO Regulator, 2.5V, 0.3V Dropout, CMOS, PDSO5, SOT-23, 5 PIN 光电二极管输出元件调节器
文件：	总5页 (文件大小：54K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

150mA ULTRA LOW DROPOUT, LOW

NOISE MICROPOWER LINEAR REGULATOR

SC5205

PRELIMINARY - February 7, 2000

TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

DESCRIPTION

FEATURES

•

Ultra low dropout voltage - 165mV @ 150mA

Guaranteed 150mA output current

Low ground pin current at all loads

<1µA quiescent current in shutdown

Wide supply voltage range 2.5V to 16V in

Wide output voltage range

The SC5205 is a 150mA ultra low dropout linear

regulator with a built in CMOS/TTL logic level enable

switch, designed specifically for battery powered

applications where low quiescent current and low

dropout are critical for battery longevity.

Excellent line regulation

Surface mount packaging (5 pin SOT-23)

The SC5205 uses a Semtech proprietary internal

PNP device for the pass element, providing a low

dropout voltage of 165mV at a load of 150mA, while

maintaining a ground pin current of 2750µA.

APPLICATIONS

The output noise is reduced by placing a 10nF

capacitor on pin 4 (bypass).

•

Battery Powered Systems

Cellular Telephones

Cordless Telephones

Pagers, Personal Digital Assistants

Portable Instrumentation

Each device contains a bandgap reference, error

amplifier, PNP pass element, thermal and current

limiting circuitry and resistor divider network for setting

output voltage.

Cameras, Portable Consumer Equipment

PCMCIA V_CC& V_PPRegulation/Switching

The SC5205 is packaged in a 5 pin SOT-23 surface

mount package for a very small footprint and it

requires only a 1µF capacitor on the output for a

minimum amount of external components.

ORDERING INFORMATION

DEVICE

SC5205-X.XCSK⁽¹⁾⁽²⁾

PACKAGE

5 pin SOT-23

Notes:

(1) Where -X.X denotes voltage options. Available volt-

ages are: 1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 3.6V, 3.8V,

4.0V and 5.0V.

(2) Add suffix ‘TR’ for tape and reel.

TYPICAL APPLICATION CIRCUIT

U1 SC5205

VIN

GND

BYP

1uF

10nF

652 MITCHELL ROAD NEWBURY PARK CA 91320

150mA ULTRA LOW DROPOUT, LOW

NOISE MICROPOWER LINEAR REGULATOR

SC5205

PRELIMINARY - February 7, 2000

ABSOLUTE MAXIMUM RATINGS

Parameter

Symbol

VIN

Maximum

-0.3 to +20

Units

Input Supply Voltage

Power Dissipation

P_D

Internally Limited

Thermal Resistance

256

°C/W

°C

Operating Ambient

Temperature Range

T_A

T_J

-40 to +85

Operating Junction

Temperature Range

-40 to +125

°C

Storage Temperature Range

T_STG

T_LEAD

ESD

-65 to +150

Lead Temperature

(Soldering) 10 Sec

260

ESD Rating (Human Body Model)

ELECTRICAL CHARACTERISTICS

Unless specified: VIN = VO_(NOM)+ 1V, I_O= 100µA, C_O= 1µF, V_ENABLE≥ 1.8V. Values in bold apply over the full operating temperature range.

Parameter

Symbol

VIN

Test Conditions

Min

2.5

-1

Typ

Max

Units

Supply Voltage Range

Output Voltage

-3

∆VO

∆T

Output Voltage

Temperature Coefficient

ppm/°C

%/V

Line Regulation

Load Regulation

Dropout Voltage⁽¹⁾

REG_(LINE)

REG_(LOAD)

V_D

VIN = (VO_(NOM)+ 1V) to 16V

I_O= 0.1mA to 150mA

I_O= 100µA

0.06 0.12

0.15

0.001 0.004 %/mA

0.007

I_O= 50mA

100

140

165

150

200

250

300

I_O= 100mA

I_O= 150mA

652 MITCHELL ROAD NEWBURY PARK CA 91320

150mA ULTRA LOW DROPOUT, LOW

NOISE MICROPOWER LINEAR REGULATOR

SC5205

PRELIMINARY - February 7, 2000

ELECTRICAL CHARACTERISTICS

Unless specified: VIN = VO_(NOM)+ 1V, I_O= 100µA, C_O= 1µF, V_ENABLE≥ 1.8V. Values in bold apply over the full operating temperature range.

Parameter

Symbol

Test Conditions

Min

Typ

Max

125

150

Units

Ground Pin Current

I_GND

I_O= 100µA

µA

I_O= 50mA

I_O= 100mA

I_O= 150mA

600 1000

1500

µA

1600 2100

2600

2750 3300

4000

V_EN< 0.4V (shutdown)

VO > VO_(NOM)- 5%

0.01

300

µA

Current Limit⁽²⁾

I_LIM

500

Ripple Rejection Ratio

Thermal Regulation

PSRR

I_O= 100µA, f = 100Hz

∆VO

0.05

%/W

P_D

RMS Output Noise

e_n

I_L= 50mA, C_BYP= 10nF, C_O= 2.2µF,

BW = 10Hz to 99kHz

210

Enable Input Voltage

V_EN

Low = O/P OFF

High = O/P ON

0.4

1.8

Enable Input Current

I_EN

-0.01

µA

-1

_EN≤ 0.4V

_EN≥ 1.8V

NOTES:

(1) Defined as the input to output differential at which the output voltage drops to 2% below the value measured at

a differential of 1V.

(2) As the load resistance further decreases, the SC5205 folds back the output current to approximately 150mA at

VO = 0V.

652 MITCHELL ROAD NEWBURY PARK CA 91320

150mA ULTRA LOW DROPOUT, LOW

NOISE MICROPOWER LINEAR REGULATOR

SC5205

PRELIMINARY - February 7, 2000

BLOCK DIAGRAM

APPLICATION HINTS (Refer to Sheet 1):

(1) C_IN(C1) is needed if the device is far from the sup-

ply’s filter capacitors, or for operation from a battery. A

value of 1.0µF or greater should be used. C_INmay be

tantalum or aluminum electrolytic.

(2) C_O(C3) should be a 1µF or greater tantalum or

aluminum electrolytic capacitor. Larger value capaci-

tors will improve the overall transient response.

(3) C_BYP(C2 - required) should be placed as close as

possible to pin 4 and ground. A 10nF ceramic capacitor

is recommended.

(4) EN should be tied to V_INif the shutdown feature is

not required. Maximum EN voltage = V_IN.

PIN CONFIGURATION

Top View

SOT-23-5L

PIN DESCRIPTION

Pin # Pin Name Pin Function

VIN

GND

Supply voltage input.

Ground.

Active high enable input. Connect to VIN if not being used.

Voltage output.

BYP

Reference bypass. Connect a 10nF capacitor (required) between this pin and GND to reduce

output noise.

652 MITCHELL ROAD NEWBURY PARK CA 91320

150mA ULTRA LOW DROPOUT, LOW

NOISE MICROPOWER LINEAR REGULATOR

SC5205

PRELIMINARY - February 7, 2000

DEVICE OUTLINE - SOT-23-5L

MINIMUM LAND PATTERN - SOT-23-5L

ECN 00-850

652 MITCHELL ROAD NEWBURY PARK CA 91320

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