LD3985 datasheet(5/14 Pages) STMICROELECTRONICS

部件名	LD3985

功能描述	ULTRA LOW DROP-LOW NOISE BICMOS VOLTAGE REGULATORS LOW ESR CAPACITORS COMPATIBLE

PDF	14 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

5 / 14 page

LD3985 SERIES

5/14

Note 1 – For VO(NOM) < 2V, VI = 2.5V

Note 2 – For VO(NOM) = 1.25V, VI = 2.5V

Note 3 – Dropout voltage is the input-to-output voltage difference at which the output voltage is 100mV below its nominal value. This speci-

fication does not apply for input voltages below 2.5V.

Note 4 – Turn-on time is time measured between the enable input just exceeding VINH High Value and the output voltage just reaching 95%

of its nominal value

Note 5 – Typical thermal protection hysteresis is 20°C

Note 6 - The minimum capacitor value is 1µF, anyway the LD3985 is still stable if the compensation capacitor has a 30% tolerance in all

temperature range.

TYPICAL PERFORMANCE CHARACTERISTICS (Tj = 25°C, VI = VO(NOM) +0.5V, CI = CO = 1µF,

CBYP = 10nF, IO = 1mA, VINH = 1.4V, unless otherwise specified)

Figure 4: Output Voltage vs Temperature

Figure 5: Output Voltage vs Temperature

Figure 6: Output Voltage vs Temperature

Figure 7: Shutdown Voltage vs Temperature

Output Capacitor

Capacitance (Note 6)

µF

ESR

5000

Ω

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

LD3985 数据表(PDF) 5 Page - STMicroelectronics