Datasheet RH3845MK DICE (Analog Devices)

DICE/DWF SPECIFICATION RH3845MK DICE Radiation Hardened High Voltage Synchronous Step-Down Controller
DEsCrIPtIon AbsolutE MAxIMuM rAtIngs
The RH3845MK is a high voltage, synchronous, current
(Note 1)
mode controller for medium to high power, high efficiency VIN ..65V supplies. It offers a wide 4V to 60V input range (7.5V BOOST ..80V minimum start-up voltage). An onboard regulator sim- BOOST to SW..24V plifies the biasing requirements by providing IC power VCC, MODE ..24V directly from VIN. SENSE+, SENSE– ...40V Additional features include an adjustable fixed operating SENSE+ TO SENSE– ..±1V frequency synchronizable to an external clock for noise SYNC, VFB, AND CSS ...5V sensitive applications, gate drivers capable of driving SHDN Pin Current ..1mA large N-channel MOSFETs, a precision undervoltage Operating Junction Temperature Range ...–55°C to 125°C lockout, low shutdown current, short-circuit protection, Storage Temperature Range ... –65°C to 150°C L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks and a programmable soft-start. Note that Burst Mode® of Linear Technology Corporation. All other trademarks are the property of their respective owners. operation, available in the LT3845, is not available in the RH3845 version.
DICE PInout PAD FUNCTION DIE CROSS REFERENCE 20 1 19
1. VIN 11. GND LTC® Finished Order
18
2. SHDN 12. SENSE– Part Number Part Number
2
3. CSS 13. SENSE+ RH3845MK RH3845MK DICE
17
4. MODE 14. PGND RH3845MK RH3845MK DWF*
16
5. VFB 15. BG
Please refer to LTC standard product data sheet for 3 other applicable product information.
6. VC 16. VCC
15 *DWF = DICE in wafer form. 4
7. SYNC 17. SW
5
8. fSET 18. TG
14
9. GND 19. BOOST
6 7 13
10. GND 20. GND
8 10 9 11 12
113mils × 124mils, Backside Metal: Alloyed Gold Layer Backside Potential: GND 1 Document Outline Description DICE Pinout Absolute Maximum Ratings Table 1: DICE/DWF Electrical Test Limits Table 2: Electrical Characteristics Table 3: Electrical Characteristics Table 4: Electrical Test Requirements Total Dose Bias Circuit — Run Mode Total Dose Bias Circuit — Shutdown Mode Burn-In Circuit — Run Mode Typical Performance Characteristics