STMicroelectronics ST1845
Rad-hard current mode PWM controller
| Part No. | ST1845 |
|---|---|
| Datasheet | ST1845 Download |
| Manufacturer |  STMicroelectronics |
| Description | Rad-hard current mode PWM controller |
| Buy | Stock & Price |
FEATURES
● Oscillator frequency guaranteed at 250 kHz● Trimmed oscillator for precise frequency control
● Current mode operation to 500 kHz automatic feed forward compensation
● Latching PWM for cycle-by-cycle current limiting
● Internally trimmed reference with undervoltage lockout
● High current totem pole output
● Undervoltage lockout with hysteresis
● Low start-up (<0.5 mA) and operating current
● Ceramic hermetic package Flat-8 metallic lid floating
● ST1843 50 krad (Si)
● ST1845 50 and 100 (Si)
● SEL free @ 120 MeV/cm2/mg at 125 °C
● ESCC qualified as 9108/020 and 9108/021
DESCRIPTION
The ST1843 and ST1845 ICs are rad-hard current mode PWM controllers providing an industry standard solution for the implementation of off-line or DC to DC fixedfrequency current mode control schemes with a minimal external part count. Its radiation hardness, hermetic packaging and its ESCC qualification make it an ideal choice for aerospace and other harsh environments. DS7312 - Rev 7 - May 2026 For further information, contact your local STMicroelectronics sales office.
