TPS54810 | www.ti.com |
SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005
FUNCTIONAL BLOCK DIAGRAM
AGND | VBIAS |
| VIN |
|
|
|
|
|
|
|
|
|
|
|
|
| Enable |
|
|
|
|
|
|
|
|
|
|
SS/ENA |
| Comparator |
|
|
|
|
|
| VBIAS | REG |
|
|
|
| Falling |
|
| SHUTDOWN |
|
|
| ||||
|
|
|
|
|
|
|
|
|
| |||
|
|
| Edge |
|
|
|
|
|
|
| ||
| 1.2 V |
|
|
|
|
| ILIM | VIN | 3 − 6 V |
| ||
| Deglitch | Thermal |
|
|
| Comparator |
|
| ||||
|
|
|
|
|
|
| ||||||
| Hysteresis: 0.03 V |
|
|
| Leading |
|
|
|
| |||
| 2.5 | ∝s | Shutdown |
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
| ||||
|
|
|
|
| 150°C |
| Edge |
|
|
|
|
|
|
| VIN UVLO |
|
|
|
| Blanking |
|
|
|
|
|
|
| Comparator |
| Falling |
|
| 100 ns |
|
|
|
|
|
|
|
|
| and |
|
|
|
|
|
|
| |
|
| VIN |
|
|
|
|
|
| BOOT |
|
| |
|
|
| Rising |
|
|
|
|
|
|
| ||
|
| 3.8 V |
|
|
|
|
|
|
|
|
| |
|
|
| Edge |
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
| |
|
| Hysteresis: 0.16 V | Deglitch |
|
|
|
|
| 30 mΩ |
|
| |
|
|
|
| 2.5 ∝s |
| SS_DIS |
|
|
|
|
|
|
|
|
|
|
|
|
|
| SHUTDOWN |
| LOUT |
| |
|
|
|
|
|
|
|
|
|
| PH | VO | |
|
| Internal/External |
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
| + |
| R | Q | Adaptive |
| CO |
| |
| (Internal | − |
|
|
| |||||||
|
|
|
| and |
|
|
| |||||
|
|
|
|
|
|
| S |
|
|
|
| |
|
|
|
|
| Error |
|
| Control Logic |
|
|
| |
|
|
|
|
| PWM |
|
|
|
|
| ||
|
|
|
|
| Amplifier |
|
|
|
|
|
| |
|
| Reference |
| Comparator |
|
| VIN |
|
|
| ||
|
|
|
|
|
|
|
|
| ||||
|
| VREF = 0.891 V |
|
|
|
|
|
| 30 mΩ |
|
| |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
| OSC |
|
|
| PGND |
|
|
|
|
| Powergood |
|
|
|
|
| Comparator |
|
|
|
|
| VSENSE |
| PWRGD |
|
|
|
| Falling | |
|
|
|
|
| |
|
|
| 0.90 Vref |
| Edge |
TPS54810 |
|
| Hysteresis: 0.03 Vref | SHUTDOWN | Deglitch |
|
|
|
| ||
|
|
|
| 35 ∝s | |
|
|
|
|
| |
VSENSE | COMP | RT | SYNC |
|
|
RELATED DC/DC PRODUCTS
D
DPT6600
6
