3

LTC1928-5

Note 5: CN/SHDN must be driven with a source impedance of at least

100

occurs after which the charge pump switches at CN/SHDN become high

impedance and the current will fall to < 8

µA.

Note 4: Operating conditions are limited by maximum junction

temperature. The regulated output specification will not apply for all

possible combinations of input voltage and output current. When

operating at maximum input voltage, the output current range may be

limited. When operating at maximum output current, the input voltage

range may be limited.

Shutdown to Enable Timing

(Figure 5)

Enable to Shutdown Timing

(Figure 5)

35

30

25

20

15

10

5

2.5

3.0

3.5

19285 G01

4.0

4.5

9

8

7

6

5

4

3

2.5

3.0

3.5

19285 G02

4.0

4.5

(A)

(A) THE MAXIMUM GENERATED NO LOAD

CPO VOLTAGE

(B) THE MINIMUM ALLOWABLE CPO VOLTAGE,

AT FULL LOAD, TO ENSURE THAT THE LDO

IS NOT DISABLED

(B)

TIME (

µs)

050

100

200

150

250

300

19285 G03

10

5

0

–5

–10

15

10

5

0

200

µs/DIV

2

0

5

4

3

2

1

0

19285 G04

1ms/DIV

2

0

5

4

3

2

1

0

19285 G05

NO LOAD

ELECTRICAL CHARACTERISTICS

TEMPERATURE (

°C)

–50

5.040

5.030

5.020

5.010

5.000

4.990

4.980

25

75

19285 G06

–25

0

50

100

125

TYPICAL PERFOR A CE CHARACTERISTICS