ST MICROELECTRONICS LD1117V33 Datasheet

Adjustable and fixed low drop positive voltage regulator

Features

■ Low dropout voltage (1 V typ.)

■ 2.85 V device performances are suitable for

SCSI-2 active termination

■ Output current up to 800 mA

■ Fixed output voltage of: 1.2 V, 1.8 V, 2.5 V,

3.3 V, 5.0 V

■ Adjustable version availability (V

■ Internal current and thermal limit

■ Available in ± 1 % (at 25 °C) and 2 % in full

temperature range

■ Supply voltage rejection: 75 dB (typ.)

Description

The LD1117 is a low drop voltage regulator able
to provide up to 800 mA of output current,
available even in adjustable version (V

1.25 V). Concerning fixed versions, are offered
the following output voltages: 1.2 V, 1.8 V, 2.5 V,

2.85 V, 3.3 V and 5.0 V. The 2.85 V type is ideal
for SCSI-2 lines active termination. The device is
supplied in: SOT-223, DPAK, SO-8 and TO-220.
The SOT-223 and DPAK surface mount packages
optimize the thermal characteristics even offering
a relevant space saving effect. High efficiency is
assured by NPN pass transistor. In fact in this
case, unlike than PNP one, the quiescent current
flows mostly into the load. Only a very common
10 µF minimum capacitor is needed for stability.
On chip trimming allows the regulator to reach a
very tight output voltage tolerance, within ± 1 % at

Table 1. Device summary

REF

REF

= 1.25 V)

=

LD1117xx

TO-220

SOT-223

25 °C. The adjustable LD1117 is pin to pin
compatible with the other standard. Adjustable
voltage regulators maintaining the better
performances in terms of drop and tolerance.

DPAK

SO-8

Part numbers

LD1117XX12 LD1117XX25 LD1117XX50

LD1117XX12C LD1117XX25C LD1117XX50C

LD1117XX18 LD1117XX33 LD1117XX

LD1117XX18C LD1117XX33C LD1117XXC

February 2012 Doc ID 2572 Rev 31 1/41

www.st.com

41

Contents LD1117xx

Contents

1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4 Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

6 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

7 LD1117 adjustable: application note . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

9 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

2/41 Doc ID 2572 Rev 31

LD1117xx List of tables

List of tables

Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Table 2. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Table 3. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Table 4. Electrical characteristics of LD1117#12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Table 5. Electrical characteristics of LD1117#18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 6. Electrical characteristics of LD1117#25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 7. Electrical characteristics of LD1117#33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Table 8. Electrical characteristics of LD1117#50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 9. Electrical characteristics of LD1117 (adjustable) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table 10. Electrical characteristics of LD1117#12C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Table 11. Electrical characteristics of LD1117#18C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 12. Electrical characteristics of LD1117#25C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 13. Electrical characteristics of LD1117#33C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 14. Electrical characteristics of LD1117#50C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 15. Electrical characteristics of LD1117C (adjustable) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 16. TO-220 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 17. DPAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 18. Footprint data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table 19. Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table 20. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Doc ID 2572 Rev 31 3/41

List of figures LD1117xx

List of figures

Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 2. Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 3. Application circuit (for 1.2 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 4. Application circuit (for other fixed output voltages) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 5. Negative supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 6. Active terminator for SCSI-2 bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 7. Circuit for increasing output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 8. Voltage regulator with reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 9. Battery backed-up regulated supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 10. Post-regulated dual supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 11. Adjustable output voltage application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 12. Adjustable output voltage application with improved ripple rejection . . . . . . . . . . . . . . . . . 24

Figure 13. Drawing dimension TO-220 (type STD-ST Dual Gauge) . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 14. Drawing dimension TO-220 (type STD-ST Single Gauge) . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 15. Drawing dimension tube for TO-220 Dual Gauge (mm.) . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 16. Drawing dimension tube for TO-220 Single Gauge (mm.) . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 17. Drawing dimension DPAK (type STD-ST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 18. Drawing dimension DPAK (type Fujitsu-subcon.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 19. Drawing dimension DPAK (type IDS-subcon.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 20. DPAK footprint recommended data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

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LD1117xx Diagram

1 Diagram

Figure 1. Block diagram

Doc ID 2572 Rev 31 5/41

Pin configuration LD1117xx

2 Pin configuration

Figure 2. Pin connections (top view)

SOT-223

DPAK

Note: The TAB is connected to the V

OUT

SO-8

TO-220

.

6/41 Doc ID 2572 Rev 31

LD1117xx Maximum ratings

3 Maximum ratings

Table 2. Absolute maximum ratings

Symbol Parameter Value Unit

(1)

V

IN

P

TOT

T

STG

T

OP

DC input voltage 15 V

Power dissipation 12 W

Storage temperature range -40 to +150 °C

for C version -40 to +125 °C

Operating junction temperature range

for standard version 0 to +125 °C

1. Absolute maximum rating of VIN = 18 V, when I

is lower than 20 mA.

OUT

Table 3. Thermal data

Symbol Parameter SOT-223 SO-8 DPAK TO-220 Unit

R

R

Thermal resistance junction-case 15 20 8 5 °C/W

thJC

Thermal resistance junction-ambient 50 °C/W

thJA

Doc ID 2572 Rev 31 7/41

Schematic application LD1117xx

4 Schematic application

Figure 3. Application circuit (for 1.2 V)

Figure 4. Application circuit (for other fixed output voltages)

8/41 Doc ID 2572 Rev 31

LD1117xx Electrical characteristics

5 Electrical characteristics

Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, R = 120 Ω between GND and OUT
pins, unless otherwise specified.

Table 4. Electrical characteristics of LD1117#12

Symbol Parameter Test condition Min. Typ. Max. Unit

V

O

V

O

ΔV

O

ΔV

O

ΔV

O

ΔV

O

V

in

I

adj

ΔI

adj

I

O(min)

I

O

eN Output noise (%V

SVR Supply voltage rejection

V

d

Output voltage Vin = 3.2 V, IO = 10 mA, TJ = 25 °C 1.188 1.20 1.212 V

= 10 to 800 mA

I

Output voltage

O

- VO = 1.4 to 10 V

V

in

1.140 1.20 1.260 V

Line regulation Vin - VO = 1.5 to 13.75 V, IO = 10 mA 0.035 0.2 %

Load regulation Vin - VO = 3 V, IO = 10 to 800 mA 0.1 0.4 %

Temperature stability 0.5 %

Long term stability 1000 hrs, TJ = 125 °C 0.3 %

Operating input voltage 15 V

Adjustment pin current Vin ≤ 15 V 60 120 µA

- VO = 1.4 to 10 V

V

Adjustment pin current change

in

= 10 to 800 mA

I

O

15µA

Minimum load current Vin = 15 V 2 5 mA

Output current Vin - VO = 5 V, TJ = 25 °C 800 950 1300 mA

) B = 10 Hz to 10 kHz, TJ = 25 °C 0.003 %

O

= 40 mA, f = 120 Hz, TJ = 25 °C

I

Dropout voltage

Thermal regulation T

O

V

- VO = 3 V, V

in

= 100 mA 1 1.1

I

O

= 500 mA 1.05 1.15

O

= 800 mA 1.10 1.2

I

O

= 25 °C, 30 ms Pulse 0.01 0.1 %/W

a

ripple

= 1 V

PP

60 75 dB

VI

Doc ID 2572 Rev 31 9/41

Electrical characteristics LD1117xx

Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, unless otherwise specified.

Table 5. Electrical characteristics of LD1117#18

Symbol Parameter Test condition Min. Typ. Max. Unit

V

O

V

O

ΔV

O

ΔV

O

ΔV

O

ΔV

O

V

in

I

d

I

O

eN Output noise voltage B = 10 Hz to 10 kHz, T

SVR Supply voltage rejection

V

d

Output voltage Vin = 3.8 V, IO = 10 mA, TJ = 25 °C 1.78 1.8 1.82 V

Output voltage IO = 0 to 800 mA, Vin = 3.3 to 8 V 1.76 1.84 V

Line regulation Vin = 3.3 to 8 V, IO = 0 mA 1 6 mV

Load regulation Vin = 3.3 V, IO = 0 to 800 mA 1 10 mV

Temperature stability 0.5 %

Long term stability 1000 hrs, TJ = 125 °C 0.3 %

Operating input voltage IO = 100 mA 15 V

Quiescent current Vin ≤ 8 V 5 10 mA

Output current Vin = 6.8 V, TJ = 25 °C 800 950 1300 mA

= 25 °C 100 µV

J

= 40 mA, f = 120 Hz, TJ = 25 °C

I

Dropout voltage

O

V

= 5.5 V, V

in

= 100 mA 1 1.1

I

O

= 500 mA 1.05 1.15

O

ripple

= 1 V

PP

60 75 dB

VI

IO = 800 mA 1.10 1.2

Thermal regulation T

= 25 °C, 30 ms Pulse 0.01 0.1 %/W

a

10/41 Doc ID 2572 Rev 31

LD1117xx Electrical characteristics

Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, unless otherwise specified.

Table 6. Electrical characteristics of LD1117#25

Symbol Parameter Test condition Min. Typ. Max. Unit

V

O

V

O

ΔV

O

ΔV

O

ΔV

O

ΔV

O

V

in

I

d

I

O

eN Output noise voltage B = 10 Hz to 10 kHz, T

SVR Supply voltage rejection

V

d

Output voltage Vin = 4.5 V, IO = 10 mA, TJ = 25 °C 2.475 2.5 2.525 V

Output voltage IO = 0 to 800 mA, Vin = 3.9 to 10 V 2.45 2.55 V

Line regulation Vin = 3.9 to 10 V, IO = 0 mA 1 6 mV

Load regulation Vin = 3.9 V, IO = 0 to 800 mA 1 10 mV

Temperature stability 0.5 %

Long term stability 1000 hrs, TJ = 125 °C 0.3 %

Operating input voltage IO = 100 mA 15 V

Quiescent current Vin ≤ 10 V 5 10 mA

Output current Vin = 7.5 V TJ = 25 °C 800 950 1300 mA

= 25 °C 100 µV

J

= 40 mA, f = 120 Hz, TJ = 25 °C

I

Dropout voltage

O

V

= 5.5 V, V

in

= 100 mA 1 1.1

I

O

= 500 mA 1.05 1.15

O

ripple

= 1 V

PP

60 75 dB

VI

IO = 800 mA 1.10 1.2

Thermal regulation T

= 25 °C, 30 ms Pulse 0.01 0.1 %/W

a

Doc ID 2572 Rev 31 11/41

Electrical characteristics LD1117xx

Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, unless otherwise specified.

Table 7. Electrical characteristics of LD1117#33

Symbol Parameter Test condition Min. Typ. Max. Unit

V

O

V

O

ΔV

O

ΔV

O

ΔV

O

ΔV

O

V

in

I

d

I

O

eN Output noise voltage B = 10 Hz to 10 kHz, T

SVR Supply voltage rejection

V

d

Output voltage Vin = 5.3 V, IO = 10 mA, TJ = 25 °C 3.267 3.3 3.333 V

Output voltage IO = 0 to 800 mA, Vin = 4.75 to 10 V 3.235 3.365 V

Line regulation Vin = 4.75 to 15 V, IO = 0 mA 1 6 mV

Load regulation Vin = 4.75 V, IO = 0 to 800 mA 1 10 mV

Temperature stability 0.5 %

Long term stability 1000 hrs, TJ = 125 °C 0.3 %

Operating input voltage IO = 100 mA 15 V

Quiescent current Vin ≤ 15 V 5 10 mA

Output current Vin = 8.3 V, TJ = 25 °C 800 950 1300 mA

= 25 °C 100 µV

J

= 40 mA, f = 120 Hz, TJ = 25 °C

I

Dropout voltage

O

V

= 6.3 V, V

in

= 100 mA 1 1.1

I

O

= 500 mA 1.05 1.15

O

ripple

= 1 V

PP

60 75 dB

VI

IO = 800 mA 1.10 1.2

Thermal regulation T

= 25 °C, 30 ms Pulse 0.01 0.1 %/W

a

12/41 Doc ID 2572 Rev 31

LD1117xx Electrical characteristics

Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, unless otherwise specified.

Table 8. Electrical characteristics of LD1117#50

Symbol Parameter Test condition Min. Typ. Max. Unit

V

O

V

O

ΔV

O

ΔV

O

ΔV

O

ΔV

O

V

in

I

d

I

O

eN Output noise voltage B = 10 Hz to 10 kHz, T

SVR Supply voltage rejection

V

d

Output voltage Vin = 7 V, IO = 10 mA, TJ = 25 °C 4.95 5 5.05 V

Output voltage IO = 0 to 800 mA, Vin = 6.5 to 15 V 4.9 5.1 V

Line regulation Vin = 6.5 to 15 V, IO = 0 mA 1 10 mV

Load regulation Vin = 6.5 V, IO = 0 to 800 mA 1 15 mV

Temperature stability 0.5 %

Long term stability 1000 hrs, TJ = 125 °C 0.3 %

Operating input voltage IO = 100 mA 15 V

Quiescent current Vin ≤ 15 V 5 10 mA

Output current Vin = 10 V, TJ = 25 °C 800 950 1300 mA

= 25 °C 100 µV

J

= 40 mA, f = 120 Hz, TJ = 25 °C

I

Dropout voltage

O

V

= 8 V, V

in

= 100 mA 1 1.1

I

O

= 500 mA 1.05 1.15

O

ripple

= 1 V

PP

60 75 dB

VI

IO = 800 mA 1.10 1.2

Thermal regulation T

= 25 °C, 30 ms Pulse 0.01 0.1 %/W

a

Doc ID 2572 Rev 31 13/41