參數(shù)資料
型號(hào): TPS56121DQPT
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, 1100 kHz SWITCHING FREQ-MAX, PDSO22
封裝: ROHS COMPLIANT, PLASTIC, SON-22
文件頁(yè)數(shù): 19/25頁(yè)
文件大?。?/td> 653K
代理商: TPS56121DQPT
SLUSAH4
– MARCH 2011
ELECTRICAL CHARACTERISTICS
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
VOLTAGE REFERENCE
TJ = 25°C, 4.5 V ≤ VVDD ≤ 14 V
597
600
603
VFB
FB input voltage
mV
–40°C ≤ TJ ≤ 125°C,
594
600
606
4.5 V
≤ VVDD ≤ 14 V
INPUT SUPPLY
VVDD
Input supply voltage range
4.5
14
V
IVDDSD
Shutdown supply current
VEN/SS = 0.2 V
80
120
A
IVDDQ
Quiescent, non-switching
Let EN/SS float, VFB = 1 V
2.5
5.0
mA
VUVLO
UVLO ON Voltage
4.0
4.3
V
VUVLO(HYS)
UVLO hysteresis
500
700
mV
ENABLE/SOFT-START
VIH
High-level input voltage, EN/SS
0.55
0.70
1.00
V
VIL
Low-level input voltage, EN/SS
0.27
0.30
0.33
V
ISS
Soft-start source current
8
10
12
A
Soft-start voltage level
– Start of
VSS
0.4
0.8
1.3
V
ramp
BP REGULATOR
VBP
Output voltage
IBP = 10 mA
6.2
6.5
6.8
V
Regulator dropout voltage, VVDD
VDO
IBP = 25 mA, VVDD = 4.5 V
70
125
mV
VBP
OSCILLATOR
RCOMP = 40.2 k, 4.5 V ≤ VVDD ≤ 14 V
270
300
330
kHz
fSW
Switching Frequency
RCOMP = open, 4.5 V ≤ VVDD ≤ 14 V
450
500
550
kHz
RCOMP = 13.3 k, 4.5 V ≤ VVDD ≤ 14 V
0.8
0.95
1.1
MHz
VRAMP
(1)
Ramp amplitude
VVDD/6.6
VVDD/6 VVDD/5.4
V
PWM
fsw = 300 kHz, VFB = 0 V,
93%
4.5 V
≤ VVDD ≤ 14 V
fsw = 500 kHz, VFB = 0 V,
DMAX
(1)
Maximum duty cycle
90%
4.5 V
≤ VVDD ≤ 14 V
fsw = 1 MHz, VFB = 0 V,
85%
4.5 V
≤ VVDD ≤ 14 V
tON(min)
(1)
Minimum controllable pulse width
100
ns
ERROR AMPLIFIER
GBWP (1)
Gain bandwidth product
10
24
MHz
AOL
(1)
Open loop gain
60
dB
Input bias current (current out of FB
IIB
VFB = 0.6 V
75
nA
pin)
IEAOP
Output source current
VFB = 0 V
1.5
mA
IEAOM
Output sink current
VFB = 1 V
1.5
mA
POWER GOOD
Feedback upper voltage limit for
VOV
655
675
700
mV
PGOOD
Feedback lower voltage limit for
VUV
500
525
550
PGOOD
VPGD-HYST
PGOOD hysteresis voltage at FB
30
45
RPGD
PGOOD pull down resistance
VFB = 0 V, IFB = 5 mA
30
70
Ω
550 mV
< VFB < 655 mV,
IPGDLK
PGOOD leakage current
10
20
A
VPGOOD = 5 V
(1)
Ensured by design. Not production tested
Copyright
2011, Texas Instruments Incorporated
3
Product Folder Link(s) :TPS56121
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