General Purpose
The LP5951 regulator is designed to meet the requirements of portable battery-powered systems providing a regulated output voltage and low quiescent current. When switched to shutdown mode via a logic signal at the Enable (EN) pin, the power consumption is reduced to virtually zero.
The LP5951 is designed to be stable with small 1-µF ceramic capacitors. The device also features internal protection against short-circuit currents and over-temperature conditions.
Performance is specified for a –40°C to 125°C temperature range.
The device is available in fixed output voltages in the range of 1.3 V to 3.7 V. For availability, please contact your local TI sales office.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
LP5951 | SOT-23 (5) | 2.90 mm x 1.60 mm |
SC70 (5) | 2.00 mm x 1.25 mm |
Changes from F Revision (May 2013) to G Revision
Changes from E Revision (April 2013) to F Revision
PIN | TYPE | DESCRIPTION | |
---|---|---|---|
NUMBER | NAME | ||
1 | IN | I | Input voltage 1.8 V to 5.5 V |
2 | GND | — | Ground |
3 | EN | I | Enable pin logic input: Low = shutdown, High = normal operation. This pin should not be left floating. |
4 | NC | — | No internal connection |
5 | OUT | O | Regulated output voltage |
MIN | MAX | UNIT | ||
---|---|---|---|---|
IN pin: Voltage to GND | –0.3 | 6.5 | V | |
EN pin: Voltage to GND | –0.3 to (VIN + 0.3 V)(2) | 6.5 | ||
Continuous power dissipation(3) | Internally limited | |||
Junction temperature (TJ-MAX ) | 150 | °C | ||
Package peak reflow temperature (10-20 s) | 240 | |||
Package peak reflow temperature (Pb-free, 10-20 s) | 260 | |||
Storage temperature, Tstg | –65 | 150 | °C |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge | Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±2000 | V |
MIN | NOM | MAX | UNIT | |||
---|---|---|---|---|---|---|
VIN | Input voltage | 1.8 | 5.5 | V | ||
VEN | Enable input voltage | 0 | (VIN + 0.3) | V | ||
TJ | Junction temperature | –40 | 125 | °C | ||
TA | Ambient temperature | See Power Dissipation And Device Operation |
THERMAL METRIC(1) | LP5951 | UNIT | ||
---|---|---|---|---|
SOT-23 (DBV) | SC70 (DCK) | |||
5 PINS | 5 PINS | |||
RθJA | Junction-to-ambient thermal resistance | 195.6 | 276.7 | °C/W |
RθJC(top) | Junction-to-case (top) thermal resistance | 108.3 | 86.3 | |
RθJB | Junction-to-board thermal resistance | 52.1 | 56.9 | |
ψJT | Junction-to-top characterization parameter | 11.0 | 1.3 | |
ψJB | Junction-to-board characterization parameter | 51.6 | 56.1 |
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
---|---|---|---|---|---|---|
VIN | Input voltage | VIN ≥ VOUT(NOM) + VDO | 1.8 | 5.5 | V | |
ΔVOUT | Output voltage tolerance | IOUT = 1mA TJ = 25°C |
–2% | 2% | ||
IOUT = 1mA –30°C ≤ TJ ≤ +125°C |
–3.5% | 3.5% | ||||
Line regulation error | VIN = VOUT(NOM) + 1 V to 5.5 V IOUT = 1 mA |
0.1 | %/V | |||
Load regulation error | IOUT = 1 mA to 150 mA | –0.01 | %/mA | |||
VDO | Output voltage dropout(3) | IOUT = 150 mA , VOUT ≥ 2.5 V | 250 | mV | ||
IOUT = 150 mA , VOUT < 2.5 V | 200 | 350 | ||||
IQ | Quiescent current | VEN = 0.9 V, ILOAD = 0 | 29 | 55 | µA | |
VEN = 0.9 V, ILOAD = 150 mA | 33 | 70 | ||||
VEN = 0 V, TJ = 25°C | 0.005 | 1 | ||||
ISC | Output current (short circuit) | VIN = VOUT(NOM) + 1 V | 150 | 400 | mA | |
PSRR | Power supply rejection ratio | Sine modulated VIN, ƒ = 100 Hz | 60 | dB | ||
Sine modulated VIN, ƒ = 1 kHz | 60 | |||||
Sine modulated VIN, ƒ = 10 kHz | 50 | |||||
EN | Output noise | BW = 10 Hz - 100 kHz | 125 | µVRMS | ||
TSD | Thermal shutdown | 160 | °C | |||
Temperature hysteresis | 20 |
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
---|---|---|---|---|---|---|
IEN | Maximum input current at EN input | 0 V ≤ VEN ≤ VIN, VIN = 5.5 V –40°C ≤ TJ ≤ 125°C |
–1 | 1 | µA | |
VIL | Low input threshold (shutdown) | VIN = 1.8 V to 5.5 V –40°C ≤ TJ ≤ 125°C |
0.4 | V | ||
VIH | High input threshold (enable) | VIN = 1.8 V to 5.5 V –40°C ≤ TJ ≤ 125°C |
0.9 |
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
---|---|---|---|---|---|---|
ΔVOUT | Dynamic line transient | VIN = VOUT(NOM) + 1 V to VOUT(NOM) + 1 V + 0.6 V in 30 µs, no load |
±2 | mV | ||
ΔVOUT | Dynamic load transient | IOUT = 0 mA to 150 mA in 10 µs IOUT = 150 mA to 0 mA in 10 µs IOUT = 1 mA to 150 mA in 1 µs IOUT = 150 mA to 1 mA in 1 µs |
-30 20 -50 40 |
mV mV mV mV |
||
ΔVOUT | Overshoot on start-up | Nominal conditions | 10 | mV | ||
TON | Turnon time | IOUT = 1 mA | 30 | µs |
PARAMETER | TEST CONDITIONS | MIN(1) | TYP | MAX(1) | UNIT | |
---|---|---|---|---|---|---|
COUT | Output capacitance | Capacitance(2)
IOUT = 150 mA, VIN = 5 V |
0.7 | 1 | 47 | µF |
ESR | 0.003 | 0.300 | Ω |