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參數資料
| 型號： | TPS51317RGBT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PQCC20 |
| 封裝： | 4 X 3.50 MM, GREEN, PLASTIC, QFN-20 |
| 文件頁數： | 24/28頁 |
| 文件大小： | 1000K |
| 代理商： | TPS51317RGBT |
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SLUSAH9
– MARCH 2011
ELECTRICAL CHARACTERISTICS (continued)
over recommended free-air temperature range, VV5IN = 5.0 V, PGND = GND (unless otherwise noted)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
TIMERS: ON-TIME, MINIMUM OFF-TIME, SS, AND I/O TIMINGS
VVIN = 5 V, VVOUT = 1.05 V, fSW = 860 KHz
240
VVIN = 5 V, VVOUT = 1.05 V, fSW = 1 MHz
210
tONESHOTC
PWM one-shot (2)
ns
VVIN = 5 V, VVOUT = 1.05 V, fSW = 1.2 MHz
175
VVIN = 5 V, VVOUT = 1.05 V, fSW = 1.5 MHz
140
VVIN = 5 V, VVOUT = 1.05 V, fSW = 1 MHz, DRVL on, SW =
tMIN(off)
Minimum OFF time
360
ns
PGND, VVOUT < VREFIN
tINT(SS)
Soft-start time
From EN = HI to VOUT =95%, default setting
1.6
ms
tINT(SSDLY)
Internal soft-start delay time
From EN = HI to VOUT ramp starts
260
s
tPGDDLY
PGOOD startup delay time
External tracking
8
ms
tPGDPDLYH
PGOOD high propagation delay time
50 mV over drive, rising edge
0.8
1
1.2
ms
tPGDPDLYL
PGOOD low propagation delay time
50 mV over drive, falling edge
10
s
tOVPDLY
OVP delay time
Time from the VOUT pin out of +20% of REFIN to OVP fault
10
s
Time from EN_INT going high to undervoltage fault is ready
2
tUVDLYEN
Undervoltage fault enable delay
ms
External tracking from VOUT ramp starts
8
tUVPDLY
UVP delay time
Time from the VOUT pin out of
–30% of REFIN to UVP fault
256
s
LOGIC PINS: I/O VOLTAGE AND CURRENT
VPGDPD
PGOOD pull-down voltage
PGOOD low impedance, ISINK = 4 mA, VV5IN = 4.5 V
0.3
V
IPGDLKG
PGOOD leakage current
PGOOD high impedance, forced to 5.5 V
–1
0
1
A
VENH
EN logic high
EN, VCCP logic
2
V
VENL
EN logic low
EN, VCCP logic
0.5
V
IEN
EN input current
1
A
Threshold 1
80
130
180
Threshold 2
200
250
300
mV
VMODETH
MODE threshold voltage(3)
Threshold 3
370
420
470
Threshold 4
1.77
1.80
1.85
V
IMODE
MODE current
15
A
(2)
Ensured by design, not production tested.
(3)
See Table 4 for descriptions of MODE parameters.
Copyright
2011, Texas Instruments Incorporated
5
Product Folder Link(s): TPS51317
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