LT1460KCS3-10 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LT1460KCS3-10

Family of Micropower Series References in SOT-23

Linear Technology 

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LT1460S3 (SOT-23)

APPLICATIONS INFORMATION

VGEN

2.5V

1.5V

VOUT

1mA

VOUT

10mA

1µs/DIV

Figure 2. CL = 0µF

1460S3 F02

VGEN

2.5V

1.5V

VOUT

1mA

VOUT

10mA

100µs/DIV

Figure 3. CL = 0.1µF

1460S3-5 F03

VGEN

2.5V

1.5V

VOUT

1µF

VOUT

4.7µF

100µs/DIV

Figure 4. IOUT = 1mA

1460S3 F04

Table 1 gives the maximum output capacitance for various

load currents and output voltages to avoid instability. Load

capacitors with low ESR (effective series resistance) cause

more ringing than capacitors with higher ESR such as

polarized aluminum or tantalum capacitors.

Table 1. Maximum Output Capacitance

VOLTAGE

OPTION IOUT = 100µA

2.5V

> 10µF

IOUT = 1mA

> 10µF

IOUT = 10mA IOUT = 20mA

2µF

0.68µF

3V

> 10µF

> 10µF

2µF

0.68µF

3.3V

> 10µF

> 10µF

1µF

0.68µF

5V

> 10µF

> 10µF

1µF

0.68µF

10V

> 10µF

1µF

0.15µF

0.1µF

Long-Term Drift

Long-term drift cannot be extrapolated from acceler-

ated high temperature testing. This erroneous tech-

nique gives drift numbers that are widely optimistic. The

only way long-term drift can be determined is to mea-

sure it over the time interval of interest. The LT1460S3

long-term drift data was taken on over 100 parts that were

soldered into PC boards similar to a “real world” applica-

tion. The boards were then placed into a constant tempera-

ture oven with TA = 30°C, their outputs were scanned

regularly and measured with an 8.5 digit DVM. Figure 5

shows typical long-term drift of the LT1460S3s.

150

100

50

0

– 50

–100

–150

0 100 200 300 400 500 600 700 800 900 1000

HOURS

1460S3 F05

Figure 5. Typical Long-Term Drift

8

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