ZHCS527G January 2007 – April 2025 LM5574
PRODUCTION DATA
| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
|---|---|---|---|---|---|---|
| STARTUP REGULATOR | ||||||
| VCC Reg | VCC Regulator Output | 6.85 | 7.15 | 7.45 | V | |
| VCC LDO Mode turn-off | 9 | V | ||||
| VCC Current Limit | VCC = 0 V, | 25 | mA | |||
| VCC SUPPLY | ||||||
| VCC UVLO Threshold | (VCC increasing). | 5.03 | 5.35 | 5.67 | V | |
| VCC Undervoltage Hysteresis | 0.35 | V | ||||
| Bias Current (Iin) | FB = 1.3 V. | 2 | 4.5 | mA | ||
| Shutdown Current (Iin) | SD = 0 V. | 48 | 85 | μA | ||
| SHUTDOWN THRESHOLDS | ||||||
| Shutdown Threshold | (SD Increasing) | 0.47 | 0.7 | 0.9 | V | |
| Shutdown Hysteresis | 0.1 | V | ||||
| Standby Threshold | (Standby Increasing) | 1.17 | 1.225 | 1.28 | V | |
| Standby Hysteresis | 0.1 | V | ||||
| SD Pull-up Current Source | 5 | μA | ||||
| SWITCH CHARACTERISTICS | ||||||
| Buck Switch Rds(on) | 750 | 1500 | mΩ | |||
| BOOST UVLO | 4 | V | ||||
| BOOST UVLO Hysteresis | 0.93 | V | ||||
| Pre-charge Switch Rds(on) | 70 | Ω | ||||
| Pre-charge Switch on-time | 250 | ns | ||||
| CURRENT LIMIT | ||||||
| Cycle by Cycle Current Limit | RAMP = 0 V | 0.6 | 0.7 | 0.8 | A | |
| Cycle by Cycle Current Limit Delay | RAMP = 2.5 V | 75 | ns | |||
| SOFT-START | ||||||
| SS Current Source | 7 | 10 | 14 | μA | ||
| OSCILLATOR | ||||||
| Frequency1 | 180 | 200 | 220 | kHz | ||
| Frequency2 | RT = 11 k?. | 425 | 485 | 525 | kHz | |
| SYNC Source Impedance | 11 | kΩ | ||||
| SYNC Sink Impedance | 110 | Ω | ||||
| SYNC Threshold (falling) | 1.3 | V | ||||
| SYNC Frequency | RT = 11 k?. | 550 | kHz | |||
| SYNC Pulse Width Minimum | 15 | ns | ||||
| RAMP GENERATOR | ||||||
Ramp Current 1 |
VIN = 60 V, VOUT=10 V. | 467 | 550 | 633 | μA | |
| Ramp Current 2 | VIN = 10 V, VOUT=10 V. | 36 | 50 | 64 | μA | |
| PWM COMPARATOR | ||||||
| Forced Off-time | 416 | 500 | 575 | ns | ||
| Min On-time | 80 | ns | ||||
| COMP to PWM Comparator Offset | 0.7 | V | ||||
| ERROR AMPLIFIER | ||||||
| Feedback Voltage | Vfb = COMP. | 1.207 | 1.225 | 1.243 | μS | |
| FB Bias Current | 10 | nA | ||||
| DC Gain | 70 | dB | ||||
| COMP Sink / Source Current | 3 | mA | ||||
| Unity Gain Bandwidth | 3 | MHz | ||||
| DIODE SENSE RESISTANCE | ||||||
| DSENSE | 250 | m? | ||||
| THERMAL SHUTDOWN | ||||||
| Tsd | Thermal Shutdown Threshold | 165 | °C | |||
| Thermal Shutdown hysteresis | 25 | °C | ||||