LM1117-3.3

Part: LM1117 from Texas Instruments

Type: Low-Dropout Linear Regulator

Description: The LM1117 is an 800-mA low dropout voltage regulator with a 1.2 V dropout at 800 mA, available in adjustable versions (1.25 V to 13.8 V) and fixed output versions (1.8 V, 2.5 V, 3.3 V, 5 V), featuring current limiting and thermal protection.

Operating Conditions:

• Supply voltage: Up to 15 V
• Operating temperature: 0 to +125 °C (LM1117), -40 to +125 °C (LM1117I)
• Output current: Up to 800 mA
• Output voltage range: 1.25 V to 13.8 V (adjustable), 1.8 V, 2.5 V, 3.3 V, 5 V (fixed)

Absolute Maximum Ratings:

• Max input voltage: 20 V
• Max junction temperature: 150 °C
• Max storage temperature: 150 °C

Key Specs:

• Dropout voltage (I_OUT = 800 mA): Typ 1.2 V, Max 1.3 V (T_J = 25°C)
• Reference voltage (LM1117-ADJ): Typ 1.25 V, Max 1.27 V (over 0°C to 125°C)
• Line regulation (LM1117-ADJ): Typ 0.035%, Max 0.2% (I_OUT = 10 mA, 1.5V <= V_IN - V_OUT <= 13.75V)
• Load regulation (LM1117-ADJ): Typ 0.2%, Max 0.4% (V_IN - V_OUT = 3 V, 10 <= I_OUT <= 800 mA)
• Current limit: Min 800 mA, Typ 1200 mA, Max 1500 mA (V_IN - V_OUT = 5 V, T_J = 25°C)
• Quiescent current: Typ 5 mA, Max 10 mA (V_IN <= 15 V, over 0°C to 125°C)
• Ripple regulation (PSRR): Typ 75 dB, Min 60 dB (f_RIPPLE = 120 Hz, V_IN - V_OUT = 1 V)
• Output voltage accuracy: ±1% (from description)

Features:

• 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)

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)
• NDE (TO-220, 3 pins)
• NDP (TO-252, 3 pins)
• NGN (WSON, 8 pins)
• KTT (TO-263, 3 pins)

• 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