參數(shù)資料
型號: TPS54262QPWPRQ1
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: SWITCHING REGULATOR, PDSO20
封裝: GREEN, PLASTIC, HTSSOP-20
文件頁數(shù): 8/42頁
文件大小: 2335K
代理商: TPS54262QPWPRQ1
SLVS996C – SEPTEMBER 2009 – REVISED JUNE 2010
www.ti.com
5) Hysteretic Mode
The device enters in this mode of operation when the main loop fails to respond during line/ load transients and
regulate within specified tolerances. The device exits this mode of operation when the main control loop
responds, after the error amplifier stabilizes, and controls the output voltage within tighter tolerance.
The power up conditions in different modes of operations are explained in Table 4.
Table 4. Power-Up Conditions
MODE OF OPERATION
POWER-UP CONDITIONS
CCM
VIN > 3.6 V (minimum)
LPM/DCM
VReg < 5.5 V and (VIN - VReg) > 2.5 V (applicable only for fsw > 600 kHz)
Output Tolerances in Different Modes of Operation
Figure 22.
Table 5.
MODE OF OPERATION
VReg LOWER LIMIT
VReg UPPER LIMIT
COMMENTS
Hysteretic mode
VReg_UV
VReg_OV
Minimum to maximum ripple on output
Low-power mode
VReg_UV
VReg + tolVReg
Minimum to maximum ripple on output
Active mode (Normal)
VReg – tolVReg
VReg + tolVReg
Minimum to maximum ripple on output
Table 6.
SUPERVISOR
VReg TYPICAL
TOLERANCE
COMMENTS
THRESHOLDS
VALUE
VReg_OV
Overvoltage threshold setting
VReg_RST
Reset threshold setting
16
Copyright 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS54262-Q1
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