LP5912

Part: LP5912-3.3DRVR — Texas Instruments

Type: Low-Noise Low-Dropout (LDO) Linear Regulator

Description: 1.6–6.5 V input, 500 mA low-noise LDO with 12 μVRMS typical output noise, 75 dB typical PSRR at 1 kHz and 30 μA typical quiescent current (enabled, no load).

Operating Conditions:

• Supply voltage (VIN): 1.6–6.5 V
• Operating junction temperature: -40 to 125 °C
• Output voltage range: 0.8–5.5 V (fixed options in 25-mV steps); output current 0–500 mA

Absolute Maximum Ratings:

• Max input voltage (VIN): 7 V (also 7 V on VOUT, VEN and VPG)
• Max junction temperature: 150 °C
• Storage temperature: -65 to 150 °C

Key Specs:

• Output voltage tolerance: ±2% for VOUT(NOM) ≥ 3.3 V (VOUT(NOM) + 0.5 V ≤ VIN ≤ 6.5 V, IOUT = 1 to 500 mA); ±3% for VOUT(NOM) < 3.3 V
• Dropout voltage: 95 mV typ, 180 mV max at IOUT = 500 mA (3.3 V ≤ VOUT(NOM) ≤ 5.5 V)
• Quiescent current: 30 μA typ, 55 μA max (VEN = 1.3 V, IOUT = 0 mA); 0.2 μA typ in shutdown (VEN = 0 V)
• Short-circuit current limit: 700 / 900 / 1100 mA (min/typ/max, TJ = 25 °C)
• PSRR (IOUT = 20 mA, VOUT ≥ 1.1 V): 80 dB at 100 Hz, 75 dB at 1 kHz, 65 dB at 10 kHz, 40 dB at 100 kHz
• Output noise: 12 μVRMS (BW = 10 Hz to 100 kHz)
• Turn-on time: 200 μs typ; PG delay: 140 μs typ; PG thresholds 94% (high) / 90% (low) of VOUT
• Thermal shutdown: 160 °C typ with 15 °C hysteresis; RθJA 71.2 °C/W (WSON-6)

Features:

• Stable with 1-μF ceramic input and output capacitors
• No noise bypass capacitor required
• Thermal-overload and short-circuit protection
• Reverse current protection
• Output automatic discharge for fast turnoff (100 Ω typical pull-down)
• Power-good output with 140-μs typical delay
• Internal soft-start to limit in-rush current
• EN input with internal 3 MΩ pulldown

Applications:

• Camera modules
• Sensors
• HiFi audio radio transceivers
• PLL/synthesizer, clocking
• Medium-current, noise-sensitive applications

Package:

• WSON (6), 2.00 mm × 2.00 mm (DRV)

• 1 · Input Voltage Range: 1.6 V to 6.5 V
• Output Voltage Range: 0.8 V to 5.5 V
• Output Current up to 500 mA
• Low Output-Voltage Noise: 12 μVRMS Typical
• PSRR at 1 kHz: 75 dB Typical
• Output Voltage Tolerance (VOUT ≥ 3.3 V): ±2%
• Low IQ (Enabled, No Load): 30 μA Typical
• Low Dropout (VOUT ≥ 3.3 V): 95 mV Typical at 500-mA Load
• Stable With 1-μF Ceramic Input and Output Capacitors
• Thermal-Overload and Short-Circuit Protection
• Reverse Current Protection
• No Noise Bypass Capacitor Required
• Output Automatic Discharge for Fast Turnoff
• Power-Good Output With 140-μs Typical Delay
• Internal Soft-Start to Limit the In-rush Current
• -40°C to +125°C Operating Junction Temperature Range

• Camera Modules
• Sensors
• HiFi Audio Radio Transceivers
• PLL/Synthesizer, Clocking
• Medium-Current, Noise-Sensitive Applications

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Pin Functions

VIN = VOUT(NOM) + 0.5 V or 1.6 V, whichever is greater; VEN = 1.3 V, CIN = 1 μF, COUT = 1 μF, IOUT = 1 mA (unless otherwise stated). (1)(2)(3)

• (4) Short-circuit current (I SC ) is equivalent to current limit. To minimize thermal effects during testing, I SC is measured with VOUT pulled to 100 mV below its nominal voltage.
• (5) Reverse current (I RO ) is measured at the IN pin.
• (6) Quiescent current is defined here as the difference in current between the input voltage source and the load at V OUT .
• (7) Ground current is defined here as the total current flowing to ground as a result of all input voltages applied to the device.
• (8) Dropout voltage (VDO) is the voltage difference between the input and the output at which the output voltage drops to 150 mV below its nominal value when VIN = VOUT + 0.5 V. Dropout voltage is not a valid condition for output voltages less than 1.6 V as compliance with the minimum operating voltage requirement cannot be assured.

over operating free-air temperature range (unless otherwise noted) (1)(2)

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

The LP5912 is designed to meet the requirements of RF and analog circuits, by providing low noise, high PSRR, low quiescent current, and low line or load transient response. The device offers excellent noise performance without the need for a noise bypass capacitor and is stable with input and output capacitors with a value of 1 μ F. The device delivers this performance in an industry standard WSON package, which for this device is specified with an operating junction temperature (TJ) of -40°C to +125°C.