CMPWR160SA datasheet(7/10 Pages) CALMIRCO

7 / 10 page

CALIFORNIA MICRO DEVICES

12/5/2000

215 Topaz Street, Milpitas, California 95035

Tel: (408) 263-3214

Fax: (408) 263-7846

www.calmicro.com

CMPWR160

Typical Transient Characteristics continued

CC Power down

Figure 8 shows the output response of the regulator

during a complete power down situation under full load

conditions with SD tied to V

CC.

Figure 8. V

CC Power Down

Shutdown Transient Response

The transient response of the output voltage to the SD

pin is shown in Figure 9. The graph shows that a rising

edge on the SD pin enables the regulator and a falling

edge disables the regulator.

The rise and fall time for the output voltages are 100µs

and 200µs respectively.

Figure 9. Shutdown Transient Response

3.50V

(500mA Load)

VCC

VOUT

M 2.00ms

1.00V

Ch2 1.00V

25.0kS/s

Tek Run

Sample

Ch2

3.0V

(500mA Load)

M 200µs

1.00V

Ch2

5.00V

25.0kS/s

Tek

3 Acqs

Ch2

VOUT

POR

Response

The transient response of the active low POR pin to V

OUT

is shown in Figure 10. When V

OUT rises above the

POR threshold voltage (typically 2.9V), the pin is forced

to logic low (0V). The pin remains at logic low for 30ms

then it is forced to logic high (3.3V). If V

OUT falls below the

POR threshold voltage during this 30ms interval POR

will remain logic low. If it falls below the voltage threshold

and then recovers the 30ms time will reset.

When V

OUT falls below the

POR threshold voltage POR is

immediately forced to logic low.

CC is tied to ground to show that the POR circuitry will

work without V

CC present.

2.90V

POR

M 10.0ms

1.00V

Ch2

200mV

5.0kS/s

Tek Run

Sample

Ch2

VOUT

2.7V

3.1V

Figure 10. POR Response

CMPWR160SA Arkusz danych(PDF) 7 Page - California Micro Devices Corp

CMPWR160SA Arkusz danych(HTML) 7 Page - California Micro Devices Corp

Html Pages

1 2 3 4 5 6 7 8 9 10

Arkusz danych Pobierz

Link URL