參數(shù)資料
型號(hào)： TPS40042DRCTG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PDSO10
封裝： 3 X 3 MM, GREEN, PLASTIC, SON-10
文件頁數(shù)： 30/35頁
文件大?。?/td> 746K
代理商： TPS40042DRCTG4
www.ti.com
ELECTRICAL CHARACTERISTICS
SLUS777 – NOVEMBER 2007
TJ = -40 °C to 85°C VVDD = 5 V, (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
INPUT SUPPLY
VVDD
Input voltage range(1)
3.0
5.5
V
IDDsd
Shutdown
VEN = VVDD
100
180
A
IDDq
Quiescent
VFB = 0.8 V
1.0
2.0
mA
IDDs
Switching current
No load at HDRV/LDRV
3.0
UVLOON
Minimum turn-on voltage
1.90
2.05
2.2
V
UVLOHYS
Hysteresis
80
130
200
mV
OSCILLATOR/ RAMP GENERATOR
fPWM
PWM frequency
3.0 V < VVDD < 5.5 V
500
600
700
kHz
fPWM
PWM frequency
VVDD = 5.0 V, 0°C < TJ < 70°C
540
600
660
kHz
VRAMP
Ramp amplitude PP
VPEAK – VVALLEY
0.75
0.87
1.0
V
VVALLEY
Ramp valley voltage
0.4
V
PWM
MAXDUTY Maximum duty cycle,
VFB = 0 V, 3.0 V < VVDD < 5.5 V
88%
95%
MINDUTY
Minimum duty cycle
0%
MIN pulse
Minimum width control range before
Minimum controllable pulse width
90
150
ns
width (2)
jumping to zero.
ERROR AMPLIFIER
VOS
FB to REFIN offset voltage
0.5 V < VREFIN < 1.5 V
-5
0
5
mV
IFB
FB, REFIN input bias current
-30
-125
nA
IOH = 0.5 mA, VFB = 0 V, VVDD = 5.5
VOH
High level output voltage
2.0
2.5
V
VOL
Low level output voltage
IOL = 0.5 mA, VFB = VVDD
80
150
mV
IOH
Output source current
VCOMP = 0.7 V, VFB = GND
1
6
mA
IOL
Output sink current
VCOMP = 0.7 V, VFB = VVDD
2
8
GBW
(2)
Gain bandwidth
5
10
MHz
AOL
Open loop gain
55
85
dB
SHORT CIRCUIT PROTECTION
Resistor COMP to GND = 2.4 k
, TJ
TH1
Low short circuit threshold voltage
80
105
130
= 25
°C
Medium short circuit threshold
Default: No resistor COMP to GND,
VTH2
140
175
210
mV
voltage
TJ = 25°C
Resistor COMP to GND = 12 k
, TJ
VTH3
High short circuit threshold voltage
250
310
370
= 25
°C
VTH(tc)
(2)
Threshold temperature coefficient
3100
ppm
Minimum HDRV pulse time in over
tON(oc)
(2)
190
current
ns
tSWOCblank
SW leading edge blanking pulse in
100
(2)
over current detection
tHICCUP
Hiccup time between restarts
40
ms
(1)
VVDD operation to 2.25 V is possible with some degradation in specifications. Under this condition, the VREFIN range is limited to 0.5 V to
0.7 V.
(2)
Ensured by design. Not production tested.
4
Copyright 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS40042
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