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參數(shù)資料
| 型號(hào)： | TPS51211DSCT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 314 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | PLASTIC, SON-10 |
| 文件頁(yè)數(shù)： | 21/26頁(yè) |
| 文件大小： | 674K |
| 代理商： | TPS51211DSCT |
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TPS51211
SLUSAA7 – NOVEMBER 2010
www.ti.com
ELECTRICAL CHARACTERISTICS
over recommended free-air temperature range, V5IN=5V. (Unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY CURRENT
TA = 25°C, No Load,
IV5IN
V5IN supply current
320
600
mA
VEN = 5 V, VVFB = 0.735 V
IV5INSDN
V5IN shutdown current
TA = 25°C, No Load, VEN = 0 V
1
mA
INTERNAL REFERENCE VOLTAGE
TA = 25°C
0.7005
0.7040
0.7075
VVFB
VFB regulation voltage
V
–10°C
≤ TA ≤ 85°C
0.697
0.704
0.711
IVFB
VFB input current
VVFB = 0.735 V, TA = 25°C
0.01
0.2
mA
OUTPUT DISCHARGE
Output discharge current from
IDischg
VEN = 0 V, VSW = 0.5 V
5
13
mA
SW pin
OUTPUT DRIVERS
Source, IDRVH = –50 mA
1.5
3.6
RDRVH
DRVH resistance
Sink, IDRVH = 50 mA
0.7
2.0
Source, IDRVL = –50 mA
1.0
3.0
RDRVL
DRVL resistance
Sink, IDRVL = 50 mA
0.5
1.6
DRVH-off to DRVL-on
7
17
tD
Dead time
ns
DRVL-off to DRVH-on
10
22
BOOT STRAP SWITCH
VFBST
Forward voltage
VV5IN-VBST, IF = 10 mA, TA = 25°C
0.1
0.2
V
IVBSTLK
VBST leakage current
VVBST = 34.5 V, VSW = 28 V, TA = 25°C
0.01
1.5
mA
DUTY AND FREQUENCY CONTROL
tOFF(min)
Minimum off-time
TA = 25°C
150
260
400
ns
tON(min)
Minimum on-time
VIN = 28 V, VOUT = 0.7 V, TA = 25°C
(1)
79
SOFTSTART
tss
Internal SS time
From VEN = high to VOUT = 95%
1
ms
POWERGOOD
PG in from lower
92.5%
95%
97.5%
VTHPG
PG threshold
PG in from higher
107.5%
110%
112.5%
PG hysteresis
2.5%
5%
7.5%
IPGMAX
PG sink current
VPGOOD = 0.5 V
3
6
mA
tPGDEL
PG delay
Delay for PG in
0.8
1
1.2
ms
LOGIC THRESHOLD AND SETTING CONDITIONS
Enable
1.8
VEN
EN voltage threshold
V
Disable
0.5
IEN
EN input current
VEN = 5V
1.0
mA
fSW
Switching frequency
TA = 25°C
(2)
266
290
314
kHz
(1)
Ensured by design. Not production tested.
(2)
Not production tested. Test condition is VIN= 8 V, VOUT= 1.1 V, IOUT = 10 A using application circuit shown in Figure 18.
4
Copyright 2010, Texas Instruments Incorporated
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