ltc1876eg-trpbf Linear Technology Corporation, ltc1876eg-trpbf Datasheet - Page 3

• Manufacturer Part Number: ltc1876eg-trpbf
• Description: High Efficiency, 2-phase, Dual Synchronous Step-down Switching Controller And Step-up Regulator
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
UVLO
V
I
V
V
DF
I
V
V
I
I
V
TG1, 2 t
TG1, 2 t
BG1, 2 t
BG1, 2 t
TG/BG t
BG/TG t
t
INTV
V
V
V
V
V
Oscillator
f
f
f
I
SENSE
RUN/SS1, 2
SCL1, 2
SDLHO
ON(MIN)
OSC
LOW
HIGH
FREQSET
OVL
STBYMD
STBYMD
RUN/SS1, 2
RUN/SS1, 2
SENSE(MAX)
INTVCC
LDO
LDO
EXTVCC
LDOHYS
MAX
CC
INT
EXT
1D
2D
Linear Regulator
r
f
r
f
MS
KA
ON RUN/SS Pin ON Threshold
LT RUN/SS Pin Latchoff Arming Threshold
PARAMETER
Undervoltage Lockout
Overvoltage Feedback Threshold
Sense Pins Total Source Current
Master Shutdown Threshold
Keep-Alive Power On-Threshold
Maximum Duty Factor
Soft-Start Charge Current
RUN/SS Discharge Current
Shutdown Latch Disable Current
Maximum Current Sense Threshold
TG Transition Time:
BG Transition Time:
Top Gate Off to Bottom Gate On Delay
Synchronous Switch-On Delay Time
Bottom Gate Off to Top Gate On Delay
Top Switch-On Delay Time
Minimum ON-Time
Internal V
INTV
EXTV
EXTV
EXTV
Oscillator frequency
Lowest Frequency
Highest Frequency
FREQSET Input Current
Rise Time
Fall Time
Rise Time
Fall Time
CC
CC
CC
CC
Load Regulation
Voltage Drop
Switchover Voltage
Hysteresis
CC
Voltage
CONDITIONS
V
Measured at V
(Each Channel); V
V
V
In Dropout
V
V
V
Soft Short Condition V
V
V
V
C
C
C
C
C
C
Tested with a Square Wave (Note 7)
6V < V
I
I
I
V
V
V
V
CC
CC
CC
A
IN
STBYMD
STBYMD
RUN/SS1, 2
RUN/SS1,
RUN/SS1,
RUN/SS1, 2
OSENSE1, 2
OSENSE1, 2
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
FREQSET
FREQSET
FREQSET
FREQSET
= 25 C. V
= 0 to 20mA, V
= 20mA, V
= 20mA, EXTV
Ramping Down
IN
= 3300pF
= 3300pF
= 3300pF
= 3300pF
= 3300pF Each Driver
= 3300pF Each Driver
The denotes the specifications which apply over the full operating
< 30V, V
Ramping Down
Ramping Up, RUN
= Open (Note 8)
= 0V
= 2.4V
= 2.4V
V
V
RUN/SS2
RUN/SS2
= 1.9V
= 4.5V
=0.5V
= 0.7V
IN
EXTVCC
OSENSE1, 2
= 15V, V
EXTVCC
SENSE1
,
CC
EXTVCC
V
Rising
Rising from 3V
SENSE1
Ramping Positive
= 5V
OSENSE1, 2
–
= 4V
, 2
= 4V
RUN/SS1, 2
–
–
SS1, 2
, 2
= V
–
= 5V
SENSE1
= 0.5V;
= 0V
= 5V, AUXV
+
, 2
+
= 0V
IN
= 3V unless otherwise noted.
0.84
MIN
–85
190
120
280
0.4
0.5
1.0
0.5
4.8
4.5
98
62
0.86
99.4
TYP
–60
180
220
140
310
3.5
0.6
1.5
1.2
1.5
4.1
1.6
5.0
0.2
4.7
0.2
50
50
40
40
90
90
–2
75
80
2
LTC1876
MAX
0.88
160
250
160
360
1.9
4.5
5.2
1.0
–1
88
90
90
90
80
4
2
4
5
UNITS
1876fa
3
kHz
kHz
kHz
mV
mV
ns
ns
ns
ns
ns
ns
ns
%
%
V
V
A
V
V
A
V
V
A
A
V
V
V
A