ZHCSN85 January 2021 LM5156 , LM51561
PRODUCTION DATA
| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
|---|---|---|---|---|---|---|
| SUPPLY CURRENT | ||||||
| ISHUTDOWN(BIAS) | BIAS shutdown current | VBIAS = 12 V, VUVLO = 0 V | 2.6 | 5 | uA | |
| IOPERATING(BIAS) | BIAS operating current | VBIAS = 12 V, VUVLO = 2.0 V, VFB = VREF, RT = 220 kΩ | 490 | 550 | uA | |
| VCC REGULATOR | ||||||
| VVCC-REG | VCC regulation | VBIAS = 8 V, No load | 6.5 | 6.85 | 7 | V |
| VCC regulation | VBIAS = 8 V, IVCC = 35 mA | 6.5 | V | |||
| VVCC-UVLO(RISING) | VCC UVLO threshold | VCC rising | 2.75 | 2.85 | 2.95 | V |
| VCC UVLO hysteresis | VCC falling | 0.063 | V | |||
| IVCC-CL | VCC sourcing current limit | VBIAS = 10 V, VVCC = 0 V | 35 | 110 | mA | |
| ENABLE | ||||||
| VEN(RISING) | Enable threshold | EN rising | 0.4 | 0.52 | 0.7 | V |
| VEN(FALLING) | Enable threshold | EN falling | 0.33 | 0.49 | 0.63 | V |
| VEN(HYS) | Enable hysteresis | EN falling | 0.03 | V | ||
| UVLO/SYNC | ||||||
| VUVLO(RISING) | UVLO / SYNC threshold | UVLO rising | 1.425 | 1.5 | 1.575 | V |
| VUVLO(FALLING) | UVLO / SYNC threshold | UVLO falling | 1.370 | 1.45 | 1.520 | V |
| VUVLO(HYS) | UVLO / SYNC threshold hysteresis | UVLO falling | 0.05 | V | ||
| IUVLO | UVLO hysteresis current | VUVLO = 1.6 V | 4 | 5 | 6 | uA |
| SPREAD SPECTRUM | ||||||
| VDITHOFF(RISING) | Clock dithering threshold | DITHOFF rising, VBIAS = 4 V | 1.1 | 1.7 | 2.1 | V |
| VDITHOFF(FALLING) | Clock dithering threshold | DITHOFF falling, VBIAS = 4 V | 0.6 | 1.2 | 1.8 | V |
| VDITHOFF(HYS) | Clock dithering threshold hysteresis | DITHOFF falling, VBIAS = 4 V | 0.5 | V | ||
| SS | ||||||
| ISS | Soft-start current | 9 | 10 | 11 | uA | |
| SS pull-down switch RDSON | 55 | Ω | ||||
| PULSE WIDTH MODULATION | ||||||
| fsw1 | Switching frequency | RT = 220 kΩ, VBIAS = 4 V | 85 | 100 | 115 | kHz |
| fsw2 | Switching frequency | RT = 9.09 kΩ, VBIAS = 4 V | 1980 | 2200 | 2420 | kHz |
| tON(MIN) | Minimum on-time | RT = 9.09 kΩ | 50 | ns | ||
| DMAX1 | Maximum duty cycle limit | RT = 9.09 kΩ, VBIAS = 4 V | 80 | 85 | 90 | % |
| DMAX2 | Maximum duty cycle limit | RT = 220 kΩ, VBIAS = 4 V | 90 | 93 | 96 | % |
| CURRENT SENSE | ||||||
| ISLOPE | Peak slope compensation current | RT = 220 kΩ | 22.5 | 30 | 37.5 | uA |
| VCLTH | Current Limit threshold (CS-GND) | 93 | 100 | 107 | mV | |
| HICCUP MODE PROTECTION (LM51561) | ||||||
| Hiccup enable cycles | 64 | Cycles | ||||
| Hiccup timer reset cycles | 8 | Cycles | ||||
| ERROR AMPLIFIER | ||||||
| VREF | FB reference | LM5156, LM51561 | 0.99 | 1 | 1.01 | V |
| Gm | Transconductance | 2 | mA/V | |||
| COMP sourcing current | VCOMP = 1.2 V | 180 | uA | |||
| COMP clamp voltage | COMP rising (VUVLO = 2.0 V) | 2.5 | 2.8 | V | ||
| COMP clamp voltage | COMP falling | 1 | 1.1 | V | ||
| OVP | ||||||
| VOVTH | Over-voltage threshold | FB rising (referece to VREF) | 107 | 110 | 113 | % |
| Over-voltage threshold | FB falling (referece to VREF) | 105 | % | |||
| PGOOD | ||||||
| PGOOD pulldown switch RDSON | 1 mA sinking | 90 | Ω | |||
| VUVTH | Under-voltage threshold | FB falling (referece to VREF) | 87 | 90 | 93 | % |
| Under-voltage threshold | FB rising (referece to VREF) | 95 | % | |||
| MOSFET DRIVER | ||||||
| High-state voltage drop | 100 mA sinking | 0.25 | V | |||
| Low-state voltage drop | 100 mA sourcing | 0.15 | V | |||
| THERMAL SHUTDOWN | ||||||
| TTSD | Thermal shutdown threshold | Temperature rising | 175 | °C | ||
| Thermal shutdown hysteresis | 15 | °C | ||||