JAJSDW2C November 2016 – August 2021 LMS3635-Q1 , LMS3655-Q1
PRODUCTION DATA
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
---|---|---|---|---|---|---|
VFB | Initial reference voltage for 5-V and 3.3-V options | VIN = 3.8 V to 36 V, TJ = 25°C | –1% | 1% | ||
VIN = 3.8 V to 36 V | –1.5% | 1.5% | ||||
IQ | Operating quiescent current; measured at VIN pin when enabled and not switching(1) | VIN = 13.5 V, VBIAS = 5 V | 7.5 | 16 | µA | |
IB_NSW | Bias current into BIAS pin, enabled, not switching | VIN = 13.5 V, VBIAS = 5 V, FPWM = 0 V | 53 | 62 | µA | |
VIN = 13.5 V, VBIAS = 3.3 V, FPWM = 0 V | 53 | 62 | ||||
ISD | Shutdown quiescent current; measured at VIN pin | EN ≤ 0.4 V | 2 | 3 | µA | |
VIN-OPERATE | Minimum input voltage to operate | Rising | 3.2 | 3.55 | 3.90 | V |
Falling | 2.95 | 3.25 | 3.55 | |||
Hysteresis | 0.28 | 0.3 | 0.4 | |||
VRESET | RESET upper threshold voltage | Rising, % of VOUT | 105% | 107% | 110% | |
RESET lower threshold voltage | Falling, % VOUT | 92% | 94% | 96.5% | ||
Magnitude of RESET lower threshold from steady state output voltage | Steady-state output voltage and RESET falling threshold read at the same TJ and VIN | 96% | ||||
VRESET_HYST | RESET hysteresis as a percent of output voltage setpoint | ±1% | ||||
VRESET_VALID | Minimum input voltage for proper RESET function | 50-µA pullup to
RESET pin, EN = 0 V, TJ= 25°C | 1.5 | V | ||
VOL | Low level RESET function output voltage | 50-µA pullup to
RESET pin, VIN = 1.5 V, EN = 0 V | 0.4 | V | ||
0.5-mA pullup to
RESET pin, VIN = 13.5 V, EN = 0 V | 0.4 | |||||
1-mA pullup to
RESET pin, VIN = 13.5 V, EN = 3.3 V | 0.4 | |||||
FSW | Switching frequency | VIN = 13.5 V, center frequency with spread spectrum, PWM operation | 360 | 400 | 440 | kHz |
VIN = 13.5 V, without spread spectrum, PWM operation | 360 | 400 | 440 | |||
FSYNC | Sync frequency range | 250 | 400 | 500 | kHz | |
DSYNC | Sync input duty cycle range | High state input < 5.5 V and > 2.3 V | 25% | 75% | ||
VFPWM | FPWM input threshold voltage | FPWM input high (MODE = FPWM) | 1.5 | V | ||
FPWM input low (MODE = AUTO with diode emulation) | 0.4 | |||||
FPWM input hysteresis | 0.15 | 1 | ||||
FSSS | Frequency span of spread spectrum operation | ±3% | ||||
FPSS | Spread-spectrum pattern frequency(2) | 1.2 | Hz | |||
IFPWM | FPWM leakage current | VIN = 13.5 V, VFPWM = 3.3 V | 1 | µA | ||
VIN = VFPWM = 13.5 V | 1 | |||||
ISYNC | SYNC leakage current | VIN = 13.5 V, VSYNC = 3.3 V | 1 | µA | ||
VIN = VSYNC = 13.5 V | 1 | |||||
IL-HS | High-side switch current limit | LMS3635-Q1 | 4.5 | 6 | 7.5 | A |
LMS3655-Q1 | 6.7 | 8.5 | 9.5 | |||
IL-LS | Low-side switch current limit | LMS3635-Q1 | 4 | 4.5 | 6.5 | A |
LMS3655-Q1 | 6 | 7 | 7.5 | |||
IL-ZC | Zero-cross current limit FPWM = low | –0.02 | A | |||
IL-NEG | Negative current limit FPWM = high | –1.5 | ||||
RDSON | Power switch on-resistance | High-side MOSFET RDSON, VIN = 13 V, IL = 1 A | 60 | 130 | mΩ | |
Low-side MOSFET RDSON, VIN = 13 V, IL = 1 A | 40 | 80 | ||||
VEN | Enable input threshold voltage - rising | Enable rising | 1.7 | 2 | V | |
VEN_HYST | Enable threshold hysteresis | 0.45 | 0.55 | V | ||
VEN_WAKE | Enable wake-up threshold | 0.4 | V | |||
IEN | EN pin input current | VIN = VEN = 13.5 V | 2 | 3 | µA | |
VCC | Internal VCC voltage | VIN = 13.5 V, VBIAS = 0 V | 3.05 | V | ||
VIN = 13.5 V, VBIAS = 3.3 V | 3.15 | |||||
VCC_UVLO | Internal VCC input undervoltage lockout | VIN rising | 2.7 | V | ||
Hysteresis below VCC-UVLO | 185 | mV | ||||
IFB | Input current from FB to AGND | Adjustable LMS36x5-Q1, FB = 1 V | 20 | nA | ||
VREF | Reference voltage for adjustable option only | TJ = 25°C | 0.993 | 1 | 1.007 | V |
TJ = –40°C to 125°C | 0.99 | 1 | 1.01 | |||
RRESET | RDSON of RESEToutput | Pull FB pin low. Sink 1-mA at RESET pin | 50 | 120 | Ω | |
VSYNC | VIH | 1.5 | V | |||
VIL | 0.4 | |||||
VHYST | 0.15 | 1 | ||||
TSD | Thermal shutdown thresholds(2) | Rising | 160 | 185 | °C | |
Hysteresis | 15 | |||||
DMAX | Maximum switch duty cycle | Fsw = 400 kHz | 96% | |||
While in dropout(2) | 98% |