LM5122MH/NOPB LM5122MHX/NOPB Power Regulator IC Switching Controllers Wide Input Sync Boost Controller
electronic voltage regulator circuit
,variable voltage regulator ic
LM5122MH/NOPB LM5122MHX/NOPB Power Regulator IC Switching Controllers Wide Input Sync Boost Controller
1 Features
- Maximum Input Voltage: 65 V
-
Minimum Input Voltage: 3 V (4.5 V for Start-Up)
-
Output Voltage up to 100 V
-
Bypass (VOUT = VIN) Operation
-
1.2-V Reference with ±1% Accuracy
-
Free-Run and Synchronizable Switching to 1 MHz
-
Peak-Current-Mode Control
-
Robust 3-A Integrated Gate Drivers
-
Adaptive Dead-Time Control
-
Optional Diode-Emulation Mode
-
Programmable Cycle-by-Cycle Current Limit
-
Hiccup-Mode Overload Protection
-
Programmable Line UVLO
-
Programmable Soft Start
-
Thermal Shutdown Protection
-
Low Shutdown Quiescent Current: 9 μA
-
Programmable Slope Compensation
-
Programmable Skip-Cycle Mode Reduces Standby Power
-
Allows External VCC Supply
-
Inductor DCR Current Sensing Capability
-
Multi-phase Capability
-
Thermally Enhanced 20 or 24-Pin HTSSOP
-
Create a Custom Design Using the LM5122 With the WEBENCH® Power Designer
2 Applications
• 12-V, 24-V, and 48-V Power Systems • Automotive Start-Stop
• Audio Power Supply
• High-Current Boost Power Supply
3 Description
The LM5122 is a multi-phase capable synchronous boost controller intended for high-efficiency synchronous boost regulator applications. The control method is based upon peak-current-mode control. Current-mode control provides inherent line feed forward, cycle-by-cycle current limiting, and ease of loop compensation.
The switching frequency is programmable up to 1 MHz. Higher efficiency is achieved by two robust N- channel MOSFET gate drivers with adaptive dead- time control. A user-selectable diode-emulation mode also enables discontinuous-mode operation for improved efficiency at light load conditions.
An internal charge pump allows 100% duty cycle for high-side synchronous switch (bypass operation). A 180° phase shifted clock output enables easy multi- phase interleaved configuration. Additional features include thermal shutdown, frequency synchronization, hiccup-mode current limit, and adjustable line undervoltage lockout.
Device Information
|
PART NUMBER |
PACKAGE |
BODY SIZE (NOM) |
|
LM5122 |
HTSSOP (20) |
6.50 mm × 4.40 mm |
|
LM5122Z |
HTSSOP (24) |
7.80 mm × 4.40 mm |
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