ST111 datasheet(6/23 Pages) SII

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HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

S-T111 Series

Rev.3.1_00

Seiko Instruments Inc.



Electrical Characteristics

Table 4

(Ta

= 25°C unless otherwise specified)

Item

Symbol

Condition

Min.

Typ.

Max.

Unit

Test

Circuit

Output voltage

VOUT(E)

VIN

= VOUT(S) + 1.0 V, IOUT = 30 mA

VOUT(S)

× 0.99

VOUT(S)

× 1.01

Output current

IOUT

VIN

≥ VOUT(S) + 1.0 V

150

⎯

Dropout voltage

Vdrop

IOUT

= 50 mA

1.5 V

≤ VOUT(S) ≤ 2.7 V

Not specified

2.8 V

≤ VOUT(S) ≤ 5.5 V

⎯

0.08

0.14

IOUT

= 100 mA

1.5 V

≤ VOUT(S) ≤ 1.6 V

⎯

0.32

0.55

1.7 V

≤ VOUT(S) ≤ 1.8 V

⎯

0.28

0.47

1.9 V

≤ VOUT(S) ≤ 2.3 V

⎯

0.25

0.35

2.4 V

≤ VOUT(S) ≤ 2.7 V

⎯

0.20

0.29

2.8 V

≤ VOUT(S) ≤ 5.5 V

⎯

0.19

0.26

Line regulation

OUT

OUT1

•

VOUT(S)

+ 0.5 V ≤ VIN ≤ 6.5 V,

IOUT

= 30 mA

⎯

0.05

0.2

%/V

Load regulation

ΔVOUT2

VIN

= VOUT(S) + 1.0 V,

1.0 mA

≤ IOUT ≤ 80 mA

⎯

Output voltage

temperature coefficient

OUT

•

VIN

= VOUT(S) + 1.0 V, IOUT = 10 mA,

−40°C ≤ Ta ≤ 85°C

⎯

±100

⎯

ppm/

°C1

Current consumption

during operation

ISS1

VIN

= VOUT(S) + 1.0 V, ON/OFF pin = ON,

no load

⎯

μA

Current consumption

during power-off

ISS2

VIN

= VOUT(S) + 1.0 V, ON/OFF pin = OFF,

no load

⎯

0.1

1.0

μA

Input voltage

VIN

⎯

2.0

⎯

6.5

⎯

ON/OFF pin

input voltage “H”

VSH

VIN

= VOUT(S) + 1.0 V, RL = 1.0 kΩ

1.5

⎯

ON/OFF pin

input voltage “L”

VSL

VIN

= VOUT(S) + 1.0 V, RL = 1.0 kΩ

⎯

0.3

ON/OFF pin

input current “H”

ISH

VIN

= 6.5 V, VON/OFF = 6.5 V

−0.1

⎯

0.1

μA

ON/OFF pin

input current “L”

ISL

VIN

= 6.5 V, VON/OFF = 0 V

−0.1

⎯

0.1

μA

Ripple rejection

VIN

= VOUT(S) + 1.0 V, f = 1.0 kHz,

ΔVrip = 0.5 Vrms, IOUT = 30 mA

⎯

Short-circuit current

Ishort

VIN

= VOUT(S) + 1.0 V, ON/OFF pin = ON,

VOUT

= 0 V

⎯

200

⎯

*1. VOUT(S): Set output voltage

VOUT(E): Actual output voltage

Output voltage when fixing IOUT (= 30 mA) and inputting VOUT(S)

+ 1.0 V

*2. The output current at which the output voltage becomes 95% of VOUT(E) after gradually increasing the output current.

*3. Vdrop = VIN1

− (VOUT3 × 0.98)

VOUT3 is the output voltage when VIN = VOUT(S)

+ 1.0 V and IOUT = 50 mA or IOUT = 100 mA.

VIN1 is the input voltage at which the output voltage becomes 98% of VOUT3 after gradually decreasing the input voltage.

*4. A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.

ΔVOUT

ΔTa []

mV/°C

*1 = V

OUT(S) []

*2 ×

ΔVOUT

ΔTa • VOUT []

ppm/°C

*3 ÷ 1000

*1. Change in temperature of output voltage

*2. Set output voltage

*3. Output voltage temperature coefficient

*5. The output current can be at least this value.

Due to restrictions on the package power dissipation, this value may not be satisfied. Attention should be paid to the

power dissipation of the package when the output current is large.

This specification is guaranteed by design.

ST111 Datasheet(PDF) 6 Page - Seiko Instruments Inc

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