The TPS61170 is a monolithic, high-voltage switching regulator with integrated 1.2-A, 40-V power MOSFET. The device can be configured in several standard switching-regulator topologies, including boost and SEPIC. The device has a wide input-voltage range to support applications with input voltage from multicell batteries or regulated 5-V, 12-V power rails.
The TPS61170 operates at a 1.2-MHz switching frequency, allowing the use of low-profile inductors and low-value ceramic input and output capacitors. External loop compensation components give the user flexibility to optimize loop compensation and transient response. The device has built-in protection features, such as pulse-by-pulse overcurrent limit, soft start, and thermal shutdown.
The FB pin regulates to a reference voltage of 1.229 V. The reference voltage can be lowered using a 1-wire digital interface (Easyscale™ protocol) through the CTRL pin. Alternatively, a pulse width-modulation (PWM) signal can be applied to the CTRL pin. The duty cycle of the signal reduces the feedback reference voltage proportionally.
The TPS61170 is available in a 6-pin 2-mm × 2-mm QFN package, allowing a compact power-supply solution.
| Topology | Boost, Flyback, Forward, SEPIC |
| Vin (min) (V) | 3 |
| Vin (max) (V) | 18 |
| Vout (min) (V) | 3 |
| Vout (max) (V) | 38 |
| Switch current limit (typ) (A) | 1.2 |
| Type | Converter |
| Regulated outputs (#) | 1 |
| Switching frequency (min) (kHz) | 1000 |
| Switching frequency (max) (kHz) | 1200 |
| Iq (typ) (mA) | 2.3 |
| Features | Enable, Light Load Efficiency, Nonsynchronous |
| Duty cycle (max) (%) | 93 |
| Operating temperature range (°C) | -40 to 85 |
| Rating | Catalog |
| WSON (DRV) | 6 | 4 mm² 2 x 2 |
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