TL497ACN | Texas Instruments
Voltage regulators, 2.5 V, 1.2 V, 3.5 V
Voltage regulator, TL497ACN, Texas Instruments
The TL497ACN incorporates all the active functions required in the construction of a switching voltage regulator. It can also be used as the control element to drive an external component for high-power-output applications. The TL497ACN is designed for ease of use in step-up, step-down, or voltage-inversion applications requiring high efficiency.
The TL497ACN is a fixed-on-time variable-frequency switching-voltage-regulator control circuit. The switch-on time is programmed by a single external capacitor connected between FREQ CONTROL and GND. This capacitor, CT, is charged by an internal constant-current generator to a predetermined threshold. The charging current and the threshold vary proportionally with VCC. Thus, the switch-on time remains constant over the specified range of input voltage (4.5 V to 12 V). Typical on times for various values of CT are as follows:
Features
- Input Current Limit Protection
- TTL-Compatible Inhibit
- Soft Start-Up Capability
| Filter | Property | Value |
|---|---|---|
| Enclosure | PDIP-14 | |
| Assembly | THT | |
| Frequency | 50 kHz | |
| Input voltage | 12 V | |
| min. operating temperature | 0 °C | |
| max. operating temperature | 70 °C |
| Property | Value |
|---|---|
| Original Packaging | Bar with 25 pieces |
| Country of origin | MX |
| Customs tariff number | 85423390 |
| Property | Value |
|---|---|
| Date of RoHS guidelines | 3/31/15 |
| SVHC free | No |
| Substance description | Lead |
| RoHS conform | Yes |