Texas Instruments 0A Evaluation Module Featuring the TPS51117 Synchronous Buck Controller with D-CAP Mode TPS51117EVM TPS51117EVM 데이터 시트
제품 코드
TPS51117EVM
www.ti.com
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SLVS631B – DECEMBER 2005 – REVISED SEPTEMBER 2009
RECOMMENDED OPERATING CONDITIONS (continued)
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
UNIT
DRVH
–0.8
34
DRVH (with respect to LL)
–0.1
5.5
Output voltage range
LL
–0.8
28
V
PGOOD, DRVL
–0.1
5.5
PGND
–0.1
0.1
Operating free-air temperature, T
A
–40
85
°C
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY CURRENT
V5FILT + V5DRV current, PWM, EN_PSV = float, VFB
I
V5FILTPWM
Supply current
400
750
μ
A
= 0.77V, LL = –0.1 V
V5FILT + V5DRV current, auto-skip, EN_PSV = 5 V,
I
V5FILTSKIP
Supply current
250
470
μ
A
VFB = 0.77V, LL = 0.5 V
I
V5DRVSDN
V5DRV shutdown current
V5DRV current, EN_PSV = 0 V
0
1
μ
A
I
V5FILTSDN
V5FILT shutdown current
V5FILT current, EN_PSV = 0 V
4.5
7.5
μ
A
VOUT AND VFB VOLTAGES
V
OUT
Output voltage
Adjustable output range
0.75
5.5
V
V
VFB
VFB regulation voltage
750
mV
T
A
= 25°C, bandgap initial accuracy
–0.9%
0.9%
VFB regulation voltage
V
VFB_TOL
T
A
= 0°C to 85°C
–1.3%
1.3%
tolerance
T
A
= -40°C to 85°C
–1.6%
1.6%
I
VFB
VFB input current
V
FB
= 0.75 V, absolute value
0.02
0.1
μ
A
R
Dischg
VOUT discharge resistance
EN_PSV = 0 V, V
OUT
= 0.5 V
20
32
Ω
ON-TIME TIMER AND INTERNAL SOFT START
T
ONN
Nominal on time
V
LL
= 12 V, V
OUT
= 2.5 V, R
TON
= 250 k
Ω
750
ns
T
ONF
Fast on time
V
LL
= 12 V, V
OUT
= 2.5 V, R
TON
= 100 k
Ω
264
330
396
ns
T
ONS
Slow on time
V
LL
= 12 V, V
OUT
= 2.5 V, R
TON
= 400 k
Ω
1169
ns
T
ON(MIN)
Minimum on time
V
OUT
= 0.75 V, R
TON
= 100 k
Ω
to 28 V
(1)
80
110
140
ns
V
FB
= 0.7 V, LL = -0.1 V,
T
OFF(MIN)
Minimum off time
440
ns
TRIP = open
Time from EN_PSV > 3 V to V
FB
regulation
T
SS
Internal soft start time
0.82
1.2
1.5
ms
value = 0.735 V
OUTPUT DRIVERS
Source, V
VBST-DRVH
= 0.5 V
5
7
Ω
R
DRVH
DRVH resistance
Sink, V
DRVH-LL
= 0.5 V
1.5
2.5
Ω
Source, V
V5DRV-DRVL
= 0.5 V
5
7
Ω
R
DRVL
DRVL resistance
Sink, V
DRVL-PGND
= 0.5 V
1.5
2.5
Ω
DRVH-low (DRVH = 1 V) to DRVL-high
10
20
50
ns
(DRVL = 4 V), LL = –0.05 V
T
D
Dead time
DRVL-low (DRVL = 1 V) to DRVH-high
30
40
60
ns
(DRVH = 4V), LL = –0.05 V
(1)
Design constraint, ensure actual on-time is larger than the max value (i.e., design R
TON
such that the min tolerance is 100 k
Ω
).
Copyright © 2005–2009, Texas Instruments Incorporated
3
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