SC417/SC427

10

Ultrasonic Powersave Mode — No Load (SC417)

Time (10μs/div)

(50mV/div)

(10V/div)

(10V/div)

(5V/div)

V

IN

= 12V, V

OUT

= 1.05V, I

OUT

= 0A, V

LDO

= V

5V

= EN/PSV= ENL = 5V

1.073V

Δ V ~ 29mV

1.044V

f=26.22kHz

Forced Continuous Mode — No Load

Time (2μs/div)

(50mV/div)

(10V/div)

(10V/div)

(5V/div)

V

IN

= 12V, V

OUT

= 1.05V, I

OUT

= 0A, V

LDO

= V

5V

= ENL = 5V, EN/PSV= float

1.078V

Δ V ~ 30mV

1.048V

f=227.4kHz

Time (100μs/div)

Enabled Loaded Output — Full Scale

(50mV/div)

(10V/div)

(5V/div)

V

IN

= 12V, V

OUT

= 1.05V, I

OUT

= 1A, V

LDO

= V

5V

= ENL = 5V. EN/PSV= 5V

1.05V

0V

ΔV/ΔT ~

1.4V/ms

Enabled Loaded Output — Power Good True

(500mV/div)

(10V/div)

(5V/div)

V

IN

= 12V, V

OUT

= 1.05V, I

OUT

= 1A, V

LDO

= V

5V

= ENL = 5V. EN/PSV= 5V

Time (400μs/div)

1.05V

0V

~2ms

Typical Characteristics (continued)

Characteristics in this section are based on using the Typical Application Circuit on page 2 (SC417/SC427).

Powersave Mode — No Load (SC427)

Time (10ms/div)

(50mV/div)

(5V/div)

V

IN

= 12V, V

OUT

= 1.05V, I

OUT

= 0A, V

LDO

= V

5V

= EN/PSV= ENL = 5V

Time (400μs/div)

Self-Biased Start-Up — Power Good True

(10V/div)

(2V/div)

(5V/div)

V

IN

= 0V to 12V step, V

OUT

= 1.05V, I

OUT

= 0A, V

LDO

= V

5V

= EN/PSV= ENL = 5V

1.05V

0V

ΔV/ΔT ~

1.4 V/ms

(500mV/div)