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参数资料
| 型号： | TPS51461RGET |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封装： | 4 X 4 MM, GREEN, PLASTIC, QFN-24 |
| 文件页数： | 26/31页 |
| 文件大小： | 1627K |
| 代理商： | TPS51461RGET |
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SLUSAD9 – DECEMBER 2010
www.ti.com
ELECTRICAL CHARACTERISTICS
over recommended free-air temperature range, VVIN = 5.0 V, VV5DRV = VV5FILT = 5 V, MODE = OPEN, PGND = GND (unless
otherwise noted)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY: VOLTAGE, CURRENTS AND 5 V UVLO
IVINSD
VIN shutdown current
EN = 'LO'
0.02
5
A
V5VIN
5VIN supply voltage
V5DRV and V5FILT voltage range
4.50
5.00
5.25
V
I5VIN
5VIN supply current
EN =’HI’, V5DRV + V5FILT supply current
1.1
2
mA
I5VINSD
5VIN shutdown current
EN = ‘LO’, V5DRV + V5FILT shutdown current
10
50
A
VV5UVLO
V5FILT UVLO
Ramp up; EN = 'HI'
4.2
4.3
4.5
V
VV5UVHYS
V5FILT UVLO hysteresis
Falling hysteresis
440
mV
VVREFUVLO
REF UVLO(1)
Rising edge of VREF, EN = 'HI'
1.8
V
VVREFUVHYS
REF UVLO hysteresis(1)
100
mV
VPOR5VFILT
Reset
OVP latch is reset by V5FILT falling below the reset threshold
1.5
2.3
3.1
V
VOLTAGE FEEDBACK LOOP: VREF, VOUT, AND VOLTAGE GM AMPLIFIER
VOUTTOL
VOUT accuracy
VVOUT = 0.8V, No droop
–1.5%
0%
1.5%
VVREF
VREF
IVREF = 0 A, TA = 25°C
2.01
V
IVREFSNK
VREF sink current
VREF within tolerance, VVREF = 2.05 V
2.5
mA
GM
Transconductance
1
mS
VDM
Differential mode input voltage
0
80
mV
ICOMPSRC
COMP pin maximum sourcing current
VCOMP = 2 V
–80
A
VOFFSET
Input offset voltage
TA = 25°C
–3
0
3
mV
RDSCH
Output voltage discharge resistance
42
Ω
f–3dbVL
–3dB Frequency(1)
6
MHz
CURRENT SENSE: CURRENT SENSE AMPLIFIER, OVER CURRENT AND ZERO CROSSING
Gain from the current of the low-side FET to PWM comparator
ACSINT
Internal current sense gain
48
53
57
mV/A
when PWM = "OFF"
IOCL
Positive overcurrent limit (valley)
6
7.5
A
IOCL(neg)
Negative overcurrent limit (valley)
–6.5
–5.0
A
VZXOFF
Zero crossing comp internal offset
0
mV
DRIVERS: BOOT STRAP SWITCH
RDSONBST
Internal BST switch on-resistance
IVBST = 10 mA, TA = 25°C
5
10
Ω
IBSTLK
Internal BST switch leakage current
VVBST = 14 V, VSW = 7 V, TA = 25°C
1
A
(1)
Ensured by design, not production tested.
4
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TPS51461
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相关代理商/技术参数 |
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| TPS51463 | 制造商:TI 制造商全称:Texas Instruments 功能描述:3.3-V/5-V Input, D-CAP+? Mode Synchronous Step-Down Integrated FETs Converter |
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