LM1117

Part: LM1117 / LM1117I — Texas Instruments

Type: Low-Dropout (LDO) Linear Regulator

Description: 800 mA low-dropout linear regulator with 1.2 V typical dropout at 800 mA, available in adjustable (1.25–13.8 V) and fixed 1.8 V, 2.5 V, 3.3 V and 5 V versions, with ±1% output accuracy at 25 °C.

Operating Conditions:

• Input voltage (VIN to GND): up to 15 V
• Junction temperature: 0 to 125 °C (LM1117); -40 to 125 °C (LM1117I)
• Output current: up to 800 mA
• Minimum 10 μF tantalum output capacitor required for stability and transient response

Absolute Maximum Ratings:

• Max input voltage (VIN to GND): 20 V
• Max junction temperature: 150 °C
• Storage temperature: -65 to 150 °C
• ESD (HBM): ±2000 V

Key Specs:

• Reference voltage (ADJ, TJ = 25 °C, IOUT = 10 mA): 1.25 V typ (1.238–1.262 V)
• Fixed output accuracy (LM1117, TJ = 25 °C): e.g. 3.3 V version 3.267–3.333 V
• Dropout voltage (LM1117) at 800 mA: 1.2 V typ at 25 °C, 1.3 V max over 0–125 °C
• Current limit (VIN − VOUT = 5 V, 25 °C): 800 mA min, 1200 mA typ, 1500 mA max
• Quiescent current (fixed versions, LM1117): 5 mA typ, 10 mA max over temperature
• Line regulation (ADJ, 25 °C): 0.2% typ, 0.4% max over temperature range
• Ripple rejection (120 Hz): 75 dB typ at 25 °C, 60 dB min over temperature
• Adjust pin current: 60 μA typ, 120 μA max over temperature
• RMS output noise (10 Hz–10 kHz): 0.003% of VOUT typ

Features:

• Available in 1.8 V, 2.5 V, 3.3 V, 5 V and adjustable versions
• Current limiting and thermal shutdown
• 800 mA output current
• Line regulation 0.2% (max)
• Load regulation 0.4% (max)
• Space-saving SOT-223 and WSON packages
• Newer drop-in alternatives: TLV1117, TLV761

Applications:

• AC drive power stage modules
• Merchant network and server PSU
• Industrial AC/DC
• Ultrasound scanners
• Servo drive control modules

Package:

• DCY (SOT-223, 4 pins): 6.50 mm × 3.50 mm
• NDE (TO-220, 3 pins): 14.986 mm × 10.16 mm
• NDP (TO-252, 3 pins): 6.58 mm × 6.10 mm
• NGN (WSON, 8 pins): 4.00 mm × 4.00 mm
• KTT (TO-263, 3 pins): 10.18 mm × 8.41 mm

• For a newer drop-in alternative, see the TLV1117
• For drop-in replacements in fixed output SOT-223 package configuration and improved functionality, see the TLV761
• Available in 1.8 V, 2.5 V, 3.3 V, 5 V, and adjustable versions
• Space-saving SOT-223 and WSON packages
• Current limiting and thermal protection
• Output current: 800 mA
• Line regulation: 0.2% (maximum)
• Load regulation: 0.4% (maximum)
• Temperature range:
• -LM1117: 0°C to +125°C
• -LM1117I: -40°C to +125°C

• AC drive power stage modules
• Merchant network and server PSU
• Industrial AC/DC
• Ultrasound scanners
• Servo drive control modules

LM1117

SNOS412Q - FEBRUARY 2000 - REVISED JANUARY 2023

Figure 6-1. DCY Package, 4-Pin SOT (Top View)

Figure 6-2. NDE Package, 3-Pin TO-220 (Top View)

Figure 6-3. KTT Package, 3-Pin TO-263 (Top View)

Figure 6-4. NDP Package, 3-Pin TO-252 (Top View)

NOT CONNECTED

VOUT

VOUT

VOUT

1

2

3

4

8

7

6

5

ADJ/GND

VIN

VIN

VIN

VOUT

When using the WSON package pins 2, 3, and 4 must be connected together and pins 5, 6, and 7 must be connected together.

Figure 6-5. NGN Package, 8-Pin WSON (Top View)

Table 6-1. Pin Functions

unless otherwise specified, T J = 25°C

LM1117

over operating free-air temperature range (unless otherwise noted) (1)

over operating free-air temperature range (unless otherwise noted)

The LM1117 is a versatile and high performance linear regulator with a wide temperature range and tight line/ load regulation operation. An output capacitor is required to further improve transient response and stability. For the adjustable option, the ADJ pin can also be bypassed to achieve very high ripple-rejection ratios. The LM1117 is versatile in its applications, including being used as a post regulator for DC/DC converters, battery chargers, and microprocessor supplies.

• (1) For all available packages, see the orderable addendum at the end of the data sheet.

Adjustable Output Regulator