0
ACTIVE
Rating |
Catalog |
Topology |
Buck, Flybuck |
Iout (max) (A) |
0.1 |
Vin (max) (V) |
100 |
Vin (min) (V) |
9 |
Vout (max) (V) |
90 |
Vout (min) (V) |
1.25 |
Switch current limit (typ) (A) |
0.3 |
Features |
Enable, Synchronous Rectification, UVLO adjustable |
Control mode |
Constant on-time (COT) |
Operating temperature range (°C) |
-40 to 125 |
Iq (typ) (A) |
0.00005 |
Duty cycle (max) (%) |
90 |
HSOIC (DDA)-8-29.4 mm² 4.9 x 6
The LM34925 regulator features all of the functions needed to implement a low cost, efficient, isolated bias regulator. This high voltage regulator contains two 100-V N-Channel MOSFET switches: a high-side buck switch and a low-side synchronous switch. The constant-on-time (COT) control scheme employed in the LM34925 device requires no loop compensation and provides excellent transient response. The regulator operates with an on-time that is inversely proportional to the input voltage. This feature allows the operating frequency to remain relatively constant. An intelligent peak current limit is implemented with integrated sense circuit. Other features include a programmable input under voltage comparator to inhibit operation during low-voltage conditions. Protection features include thermal shutdown and VCC undervoltage lockout (UVLO). The LM34925 device is offered in 8-pin WSON and
8-pin SO PowerPAD plastic packages.
WELL LINK CHIPS GROUP CO.,LIMITED FLAT/RM 1802 BEVERLY HOUSE 93-107 LOCKHART ROAD WANCHAI HK
