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参数资料
| 型号： | LTC3828 |
| 厂商： | Linear Technology Corporation |
| 英文描述： | 16-Bit Bus Transceiver With 3-State Outputs 48-SSOP -40 to 85 |
| 中文描述： | 双2相降压型跟踪控制器 |
| 文件页数： | 3/32页 |
| 文件大小： | 396K |
| 代理商： | LTC3828 |
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LTC3828
3828f
3
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25
°
C. V
IN
= 15V, V
RUN1, 2
= 5V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
g
mGBW1, 2
Transconductance Amplifier GBW
I
TH1, 2
= 1.2V; (Note 3)
I
Q
Input DC Supply Current
(Note 4)
Normal Mode
V
IN
= 15V; V
OUT1
= 5V
Shutdown
V
RUN/SS1, 2
= 0V
V
FCB
Forced Continuous Threshold
I
FCB
Forced Continuous Pin Current
V
FCB
= 0.85V
V
BINHIBIT
Burst Inhibit (Constant Frequency)
Measured at FCB pin
Threshold
UVLO
Undervoltage Lockout
V
IN
Ramping Down
V
OVL
Feedback Overvoltage Lockout
Measured at V
OSENSE1, 2
I
SENSE
Sense Pins Total Source Current
(Each Channel); V
SENSE1
–
, 2
–
= V
SENSE1
+
, 2
+
= 0V
DF
MAX
Maximum Duty Factor
In Dropout
I
TRCKSS1,2
Soft-Start Charge Current
V
RUN1, 2
ON
RUN Pin ON Threshold
V
RUN1,
V
RUN2
Rising
V
SENSE(MAX)
Maximum Current Sense Threshold
V
OSENSE1, 2
= 0.7V,V
SENSE1
–
, 2
–
= 5V
V
OSENSE1, 2
= 0.7V,V
SENSE1
–
, 2
–
= 5V
TG Transition Time:
(Note 5)
TG1, 2 t
r
Rise Time
C
LOAD
= 3300pF
TG1, 2 t
f
Fall Time
C
LOAD
= 3300pF
BG Transition Time:
(Note 5)
BG1, 2 t
r
Rise Time
C
LOAD
= 3300pF
BG1, 2 t
f
Fall Time
C
LOAD
= 3300pF
TG/BG t
1D
Top Gate Off to Bottom Gate On Delay
Synchronous Switch-On Delay Time
C
LOAD
= 3300pF Each Driver
BG/TG t
2D
Bottom Gate Off to Top Gate On Delay
Top Switch-On Delay Time
C
LOAD
= 3300pF Each Driver
t
ON(MIN)
Minimum On-Time
Tested with a Square Wave (Note 6)
INTV
CC
Linear Regulator
V
INTVCC
Internal V
CC
Voltage
6V < V
IN
< 30V
V
LDO
INT
INTV
CC
Load Regulation
I
CC
= 0 to 20mA
Oscillator and Phase-Locked Loop
f
NOM
Nominal Frequency
V
PLLFLTR
= 1.2V
f
LOW
Lowest Frequency
V
PLLFLTR
= 0V
f
HIGH
Highest Frequency
V
PLLFLTR
≥
2.4V
I
PLLFLTR
Phase Detector Output Current
Sinking Capability
f
PLLIN
< f
OSC
Sourcing Capability
f
PLLIN
> f
OSC
PGOOD Output
V
PGL
PGOOD Voltage Low
I
PGOOD
= 2mA
I
PGOOD
PGOOD Leakage Current
V
PGOOD
= 5V
V
PG
PGOOD Trip Level, Either Controller
V
OSENSE
with Respect to Set Output Voltage
V
OSENSE
Ramping Negative
V
OSENSE
Ramping Positive
ELECTRICAL CHARACTERISTICS
MIN
TYP
3
MAX
UNITS
MHz
2
3
mA
μ
A
20
100
0.84
–0.1
4.8
●
0.76
–0.50
0.800
–0.18
4.3
V
μ
A
V
●
3.5
0.86
–65
99.4
1.2
1.5
75
75
4
V
V
●
0.84
–90
98
0.5
1.0
62
60
0.88
μ
A
%
μ
A
V
mV
mV
2.0
85
88
●
55
55
100
100
ns
ns
65
55
120
100
ns
ns
60
ns
80
120
ns
ns
4.8
5.0
0.2
5.2
2.0
V
%
360
230
480
400
260
550
440
290
590
kHz
kHz
kHz
–17
17
μ
A
μ
A
0.1
0.3
±
1
V
μ
A
–6
6
–7.5
7.5
–9.5
9.5
%
%
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