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参数资料
| 型号： | TPS53321RGTR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, 1210 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, QFN-16 |
| 文件页数： | 18/23页 |
| 文件大小： | 505K |
| 代理商： | TPS53321RGTR |
SLUSAF3 – DECEMBER 2010
www.ti.com
ELECTRICAL CHARACTERISTICS
over recommended free-air temperature range, VIN = 3.3 V, VVDD = 3.3 V, PGND = GND (Unless otherwise noted).
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY: VOLTAGE, CURRENTS, and UVLO
VIN
VIN supply voltage
Nominal input voltage range
2.9
6.0
V
IVINSDN
VIN shutdown current
EN = 'LO'
3
A
VUVLO
VIN UVLO threshold
Ramp up; EN = 'HI'
2.8
V
VUVLOHYS
VIN UVLO hysteresis
VIN UVLO Hysteresis
130
mV
VDD
Internal circuitry supply voltage
Nominal 3.3-V input voltage range
2.9
3.3
3.5
V
IDDSDN
VDD shut down current
EN = 'LO'
5
A
IDD
Standby current
EN = 'HI', no switching
2.2
3.5
mA
VDDUVLO
3.3V UVLO threshold
Ramp up; EN =’HI’
2.8
V
VDDUVLOHYS
3.3V UVLO hysteresis
75
mV
VOLTAGE FEEDBACK LOOP: VREF AND ERROR AMPLIFIER
VVREF
VREF
Internal precision reference voltage
0.6
V
0°C
≤ TA ≤ 85°C
–1%
1%
TOLVREF
VREF Tolerance
–40°C
≤ TA ≤ 85°C
–1.25%
1.25%
UGBW(1)
Unity gain bandwidth
14
MHz
AOL
(1)
Open loop gain
80
dB
IFBINT
FB input leakage current
Sourced from FB pin
30
nA
Output sinking and sourcing
IEAMAX
(1)
CCOMP = 20 pF
5
mA
current
SR(1)
Slew rate
5
V/s
OCP: OVERCURRENT AND ZERO CROSSING
When IOUT exceeds this threshold for 4
IOCPL
Overcurrent limit on upper FET
consecutive cycles. VIN=3.3 V,
6.0
6.5
7.0
A
VOUT=1.5 V with 1-H inductor, TA = 25°C
Immediately shut down when sensed current
One time overcurrent latch off
IOCPH
reach this value. VIN=3.3 V,
6.25
6.80
7.35
A
on the lower FET
VOUT=1.5 V with 1-H inductor, TA = 25°C
tHICCUP
Hiccup time interval
12.5
14.5
16.5
ms
Zero crossing comparator
VZXOFF
(1)
PGND – SW, skip mode
–4.5
–3.0
–1.5
mV
internal offset
PROTECTION: OVP, UVP, PGD, AND INTERNAL THERMAL SHUTDOWN
Overvoltage protection
VOVP
Measured at FB w/r/t VREF
114%
117%
120%
threshold voltage
Undervoltage protection
VUVP
Measured at FB w/r/t VREF
80%
83%
86%
threshold voltage
VPGDL
PGD low threshold
Measured at FB w/r/t VREF
80%
83%
86%
VPGDU
PGD upper threshold
Measured at FB w/r/t VREF.
114%
117%
120%
Minimum Vin voltage for valid
Measured at VIN with 1-mA (or 2-mA) sink
VINMINPG
1
V
PGD at start up.
current on PGD pin at start up
THSD(1)
Thermal shutdown
Latch off controller, attempt soft-stop
130
140
150
°C
THSDHYS
(1)
Thermal Shutdown hysteresis
Controller restarts after temperature has dropped
40
°C
(1)
Ensured by design. Not production tested.
4
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s) :TPS53321
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