ST2L05 datasheet(12/23 Pages) STMICROELECTRONICS

12 / 23 page

ST2L05

12/23

Table 13: Electrical Characteristics Of Adjustable Output (IO = 10mA to 1A, TJ = 0 to 125°C,

VI = 4.5V to 7V, CI = 4.7µF, CO1 = CO2 = 4.7µF, otherwise specified)

NOTE 1: Bandwidth of 10 Hz to 10KHz.

NOTE 2: 120Hz input ripple.

NOTE 3: CI = 20µF, C1 and CO2 = 10µF. CI, CO1 and CO2 are all X7R ceramic capacitors.

NOTE 4: Guaranteed by design, not tested in production.

NOTE 5: % undershoot or overshoot of VO.

APPLICATION HINTS

EXTERNAL CAPACITORS

Like any low-dropout regulator, the ST2L05 requires external capacitors for stability. We suggest

soldering both capacitors as close as possible to the relative pins (1, 4 and 5).

INPUT CAPACITOR

An input capacitor, whose value is, at least, 2.2µF is required; the amount of the input capacitance can be

increased without limit if a good quality tantalum or aluminium capacitor is used.SMD X7R or Y5V ceramic

multilayer capacitors could not ensure stability in any condition because of their variable characteristics

with Frequency and Temperature; the use of this capacitor is strictly related to the use of the output

capacitors. For more details read the “OUTPUT CAPACITOR SECTION”.The input capacitor must be

located at a distance of not more than 0.5" from the input pin of the device and returned to a clean analog

ground.

OUTPUT CAPACITOR

The ST2L05 is designed specifically to work with Ceramic and Tantalum capacitors.Special care must be

taken when a Ceramic multilayer capacitor is used.Due to their characteristics they can sometimes have

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Reference Voltage

IO = 5mA to 1A, VI = 4.75 to 5.25V,

T = 25°C

1.225

1.25

1.275

Reference Voltage

IO = 5mA to 1A, VI = 4.75 to 5.25V

1.212

1.25

1.287

∆V

Line Regulation 2

VI = 4.75 to 5.25V, IO = 5mA to 1A

0.35

∆V

Load Regulation 2

VI = 4.75V, IO = 10mA to 1A

0.4

Dropout Voltage

∆V

O = -1%

IO = 1A

1.3

Current Limit

VI = 5.5V

IADJ

Adjustable Current (sinking)

µA

I∆ADJ

Adjustable Current Change

IO = 10mA to 1A

200

IOMIN

Min. Output Current for

regulation

2mA

RMS Output Noise (1)(4)

T = 25°C

0.003

SVR

Supply Voltage

Rejection (2)(4)

VI = 5V

∆V

O2/∆IO2 Transient Response

Change of VO1 with step

load change(3)(4)

VI = 5V, IO = 1mA to 1A, tr ≥ 1µs

10(5)

VI = 5V, IO = 1A to 1mA, tf ≥ 1µs

10(5)

∆V

O2/∆VI

Transient Response

Change of VOUT1 with

application of VI

(3)(4)

0 to 5V step input, IO= 1mA to 1A,

tr ≥ 1µs

10(5)

∆V

O2/∆IO2 Transient Response Short

Circuit Removal

Response (3)(4)

VI = 5V, IO = short to IO = 10mA

20(5)

Thermal Regulation (4)

IO = 1A, tPULSE = 30ms

0.1

%/W

Temperature Stability (4)

0.5

Long Term Stability (4)

(1000Hrs)

TJ = 125°C

0.3

ST2L05 数据表(PDF) 12 Page - STMicroelectronics

ST2L05 数据表(HTML) 12 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

数据表下载

链接网址

ST2L05 数据表(PDF) 12 Page - STMicroelectronics

ST2L05 数据表(HTML) 12 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

数据表 下载

链接网址

数据表下载