LTC2926C ................................................ 0°C to 70°C
LTC2926I ............................................. –40°C to 85°C
Storage Temperature Range
GN Package ....................................... –65°C to 150°C
UFD Package...................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec)
GN Package ...................................................... 300°C
Supply Voltage (V
CC
) ................................. –0.3V to 10V
Input Voltages
ON ......................................................... –0.3V to 10V
RAMP .............................................–0.3V to V
CC
+ 1V
TRACK1, TRACK2 ........................–0.3V to V
CC
+ 0.3V
PGTMR ........................................–0.3V to V
CC
+ 0.3V
Input/Output Voltages
FAULT .................................................... –0.3V to 10V
STATUS/PGI (Note 3) .......................... –0.3V to 11.5V
Output Voltages
RAMPBUF ....................................–0.3V to V
CC
+ 0.3V
FB1, FB2, D1, S1, D2, S2 ....................... –0.3V to 10V
MGATE, RSGATE (Note 3)................... –0.3V to 11.5V
SGATE1, SGATE2 (Note 3) .................. –0.3V to 11.5V
PACKAGE/ORDER I FOR ATIO
TOP VIEW
V
CC
TRACK1
FB1
S1
SGATE1
D1
ON
PGTMR
FAULT
1
2
3
4
5
6
7
8
9
20 RAMPBUF
19 TRACK2
18 FB2
17 S2
16 SGATE2
15 D2
14 STATUS/PGI
13 RSGATE
RAMPBUF
TRACK1
20 19 18 17
FB1 1
S1 2
SGATE1 3
D1 4
ON 5
PGTMR 6
7
FAULT
8
GND
9 10
RAMP
MGATE
21
16 FB2
15 S2
14 SGATE2
13 D2
12 STATUS/PGI
11 RSGATE
12 MGATE
11 RAMP
GND 10
GN PACKAGE
20-LEAD PLASTIC SSOP
T
JMAX
= 125°C,
θ
JA
= 85°C/W
UFD PACKAGE
20-LEAD (4mm
×
5mm) PLASTIC QFN
EXPOSED PAD (PIN 21) IS GND
PCB CONNECTION OPTIONAL
T
JMAX
= 125°C,
θ
JA
= 43°C/W
ORDER PART NUMBER
LTC2926CGN
LTC2926IGN
Order Options
Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
http://www.linear.com/leadfree/
ORDER PART NUMBER
LTC2926CUFD
LTC2926IUFD
UFD PART MARKING*
2926
2926
Consult LTC Marketing for parts specified with wider operating temperature ranges.*The temperature grade is identified by a label on the shipping container.
TRACK2
V
CC
2
U
U
W
W W
U
W
TOP VIEW
2926fa
LTC2926
ELECTRICAL CHARACTERISTICS
SYMBOL
Supply Voltage
V
CC
I
CC
Input Supply Voltage
Input Supply Current
Operating Range
I
TRACKn
= 0mA, I
FBn
= 0mA,
I
RAMPBUF
= 0mA
I
TRACKn
= –1mA, I
FBn
= –1mA,
I
RAMPBUF
= –3mA
V
CC(UVLO)
ΔV
CC(UVLO)
Control and I/O
V
ON(TH)
ΔV
ON(TH)
I
ON
V
ON(CLR)
t
CLR
V
ON(ARM)
t
ARM
V
FAULT(TH)
I
FAULT(UP)
V
FAULT(OL)
V
FAULT(OH)
V
PGI(TH)
ΔV
PGI(TH)
I
PGI(UP)
V
STATUS(OL)
V
STATUS(OH)
V
PGTMR(TH)
I
PGTMR(UP)
I
PGTMR(DN)
V
PGTMR(CLR)
Ramp Buffer
I
RAMP(IN)
V
RAMPBUF(OS)
V
RAMPBUF(OL)
RAMP Pin Input Current
Ramp Buffer Offset Voltage
RAMPBUF Pin Output Low Voltage
0V < V
RAMP
< 5.5V, V
CC
= 5.5V
V
RAMP
= 1/2 V
CC
, I
RAMPBUF
= 0mA
I
RAMPBUF
= 3mA
●
●
●
●
●
●
●
●
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V unless otherwise specified.
PARAMETER
CONDITIONS
MIN
2.9
1.5
8.5
2.2
15
TYP
3.3
2.5
9.5
2.4
50
MAX
5.5
3.5
10.5
2.6
75
UNITS
V
mA
mA
V
mV
Input Supply Undervoltage Lockout
Input Supply Undervoltage Lockout
Hysteresis
ON Pin Threshold Voltage
ON Pin Threshold Voltage Hysteresis
ON Pin Input Current
ON Pin Fault Clear Threshold Voltage
Fault Clear Delay
ON Pin Fault Arm Threshold Voltage
Fault Arm Delay
FAULT Pin Input Threshold Voltage
FAULT Pin Pull-up Current
FAULT Pin Output Low Voltage
FAULT Pin Output High Voltage
(V
CC
– V
FAULT
)
STATUS/PGI Pin Input Threshold
Voltage
STATUS/PGI Pin Input Threshold
Voltage Hysteresis
STATUS/PGI Pin Pull-Up Current
STATUS/PGI Pin Output Low Voltage
STATUS/PGI Pin Output High Voltage
(V
STATUS/PGI
– V
CC
)
PGTMR Pin Threshold Voltage
PGTMR Pin Pull-Up Current
PGTMR Pin Pull-Down Current
PGTMR Pin Clear Threshold Voltage
V
CC
Rising
V
ON
Rising
V
ON
= 1.2V, V
CC
= 5.5V
V
ON
Falling
V
ON
Falling
V
ON
Rising
V
ON
Rising
V
FAULT
Falling
Fault Latch Clear, V
FAULT
= 1.5V
Fault Latch Set, I
FAULT
= 5mA, V
CC
= 2.7V
Fault Latch Clear, I
FAULT
= –1µA
V
STATUS/PGI
Rising
●
●
●
●
●
●
●
●
●
●
●
●
●
1.20
40
0.465
1
0.565
1
0.465
–3.0
300
1.10
30
–7
5.0
1.10
–8
0.5
50
1.23
75
0
0.500
3
0.600
4.5
0.500
–8.5
100
550
1.23
75
–10
200
5.5
1.23
–10
4
100
0
0
32
1.26
110
±100
0.535
10
0.635
10
0.535
–13
400
900
1.36
150
–13
400
6.0
1.36
–12
10
150
±1
±10
60
V
mV
nA
V
µs
V
µs
V
µA
mV
mV
V
mV
µA
mV
V
V
µA
mA
mV
µA
mV
mV
STATUS/PGI On, V
STATUS/PGI
= 1.5V
V
ON
Low, I
STATUS/PGI
= 5mA, V
CC
= 2.7V
I
STATUS/PGI
= –1µA
V
PGTMR
Rising
ON High, V
PGTMR
= 1V
ON Low, V
PGTMR
= 0.1V, V
CC
= 2.7V
V
PGTMR
Falling
●
●
●
●
●
●
●
2926fa
3
LTC2926
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V unless otherwise specified.
SYMBOL
V
RAMPBUF(OH)
Tracking Channels
I
ERROR(%)
V
TRACK
V
FB(REF)
I
FB(LEAK)
V
FB(CLAMP)
ΔV
MGATE
I
MGATE(UP)
I
MGATE(DN)
I
MGATE(FAULT)
Slave Supplies
ΔV
SGATE
I
SGATE(UP)
I
SGATE(DN)
I
SGATE(UPFST)
I
SGATE(DNFST)
I
SGATE(FAULT)
SGATE Pins External N-Channel Gate
Drive (V
SGATEn
– V
CC
)
SGATE Pins Pull-Up Current
SGATE Pins Pull-Down Current
SGATE Pins Fast Pull-Up Current
SGATE Pins Fast Pull-Down Current
SGATE Pins Fault Pull-Down Current
I
SGATEn
= –1µA, V
FBn
= 0.75V
Fault Latch Clear, V
FBn
= V
FB(REF)
– 10mV,
V
SGATEn
= 3.3V
Fault Latch Clear, V
FBn
= V
FB(REF)
+ 10mV,
V
SGATEn
= 3.3V
Fault Latch Clear, V
FBn
= 0V, V
SGATEn
= 3.3V
Fault Latch Clear, V
FBn
= 1V, V
SGATEn
= 3.3V
Fault Latch Set, V
ON
High, V
SGATEn
= 5.5V,
V
CC
= 5.5V
I
RSGATE
= –1µA
Fault Latch Clear, Switches On, V
RSGATE
= 0V
Fault Latch Clear, Switches Off,
V
RSGATE
= 3.3V
Fault Latch Set, Switches Off,
V
RSGATE
= 5.5V, V
CC
= 5.5V
Ramping Completed on Pin Low, RSGATE
Falling
Switches On, V
Dn
= V
CC
+ 0.3V, I
Sn
= –10mA
●
●
●
●
●
●
ELECTRICAL CHARACTERISTICS
PARAMETER
RAMPBUF Pin Output High Voltage
(V
CC
– V
RAMPBUF
)
I
FBn
to I
TRACKn
Current Mismatch
(I
FBn
– I
TRACKn
)/I
TRACKn
• 100%
TRACK Pins Voltage
FB Pins Internal Reference Voltage
FB Pins Leakage Current
FB Pins Clamp Voltage
MGATE Pin External N-Channel Gate
Drive (V
MGATE
– V
CC
)
MGATE Pin Pull-Up Current
MGATE Pin Pull-Down Current
MGATE Pin Fault Pull-Down Current
CONDITIONS
I
RAMPBUF
= –3mA
●
MIN
TYP
60
MAX
80
UNITS
mV
I
TRACKn
= –10µA
I
TRACKn
= –1mA
I
TRACKn
= –10µA
I
TRACKn
= –1mA
V
TRACKn
= V
CC
, I
FBn
= 0mA
V
FBn
= 0.8V, V
CC
= 5.5V
–1mA < I
FBn
< –1µA
I
MGATE
= –1µA
Fault Latch Clear, V
ON
High, V
MGATE
= 3.3V
Fault Latch Clear, V
ON
Low, V
MGATE
= 3.3V
Fault Latch Set, V
ON
High, V
MGATE
= 5.5V,
V
CC
= 5.5V
●
●
●
●
●
●
●
●
●
●
●
0
0
0.776
0.776
0.784
1.7
5.0
–7
7
5
0.800
0.800
0.800
0
2.0
5.5
–10
10
20
±3
±3
0.824
0.824
0.816
±10
2.4
6.0
–13
13
50
%
%
V
V
V
nA
V
V
µA
µA
mA
Master Ramp and Supply
5.0
–6
6
–21
21
5
5.5
–10
10
–30
30
20
6.0
–13
13
–39
39
50
V
µA
µA
µA
µA
mA
Remote Sense Switches
ΔV
RSGATE
I
RSGATE(UP)
I
RSGATE(DN)
I
RSGATE(FAULT)
V
RSGATE(TH)
R
SW(ON)
RSGATE Pin External N-Channel Gate
Drive (V
RSGATE
– V
CC
)
RSGATE Pin Pull-Up Current
RSGATE Pin Pull-Down Current
RSGATE Pin Fault Pull-Down Current
RSGATE Pin Threshold Voltage
Remote Sense Switch On-Resistance
●
●
●
●
●
●
5.0
–7
7
5
1.10
5.5
–10
10
20
1.23
2
6.0
–13
13
50
1.36
10
V
µA
µA
mA
V
Ω
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
All currents into the device pins are positive; all currents out of
the device pins are negative. All voltages are referenced to ground unless
otherwise specified.
Note 3:
The MGATE, SGATE1, SGATE2, RSGATE and STATUS/PGI pins are
internally limited to a minimum of 11.5V. Driving these pins to voltages
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