LTC1700 Linear Technology, LTC1700 Datasheet - Page 3

• Manufacturer Part Number: LTC1700
• Description: No RSENSE Synchronous Step-Up DC/DC Controller
• Manufacturer: Linear Technology

temperature range, otherwise specifications are at T
ELECTRICAL CHARACTERISTICS
SYMBOL
TG t
TG t
BG t
BG t
t
t
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1700E is guaranteed to meet performance specifications
from 0 C to 70 C. Specifications over the –40 C to 85 C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: T
dissipation P
TYPICAL PERFORMANCE CHARACTERISTICS
dll
dhh
1.210
1.208
1.206
1.204
1.202
1.200
1.198
1.196
1.194
1.192
1.190
r
f
r
f
– 55
Reference Voltage vs
Temperature
J
is calculated from the ambient temperature T
–35
D
according to the following formula:
–15
TEMPERATURE ( C)
5
PARAMETER
TG Transition Time
BG Transition Time
Dead Time
T
J
TG Gate Drive Rise Time
TG Gate Drive Fall Time
BG Gate Drive Rise Time
BG Gate Drive Fall Time
BG and TG Gates Go Low
BG and TG Gates Go High
= T
25
A
45
+ (P
65
D
• 150 C/W)
W
85 105
1700 G01
U
125
A
and power
20
18
16
14
12
10
8
6
4
2
0
1.5
A
Shutdown Current vs Supply
Voltage
= 25 C. V
2.0
CONDITIONS
C
C
C
C
C
C
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
The
2.5
= 3000pF, 10% to 90%
= 3000pF, 90% to 10%
= 3000pF, 10% to 90%
= 3000pF, 90% to 10%
= 3000pF on BG and TG
= 3000pF on TG and BG
SUPPLY VOLTAGE (V)
3.0
OUT
denotes the specifications which apply over the full operating
3.5 4.0
= 3V unless otherwise specified.
Note 4: At an input supply less than 2.3V, only the start-up circuitry of the
LTC1700 is active. This test ensures the start-up circuitry is working.
Note 5: An input supply at or above this minimum operating voltage
activates the main control loop. Start-up circuitry of the LTC1700 is
shut off.
Note 6: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 7: The LTC1700 is tested in a feedback loop that servos V
feedback point for the error amplifier (V
4.5 5.0 5.5
1700 G02
6.0
250
200
150
100
50
0
1.5
Quiescent Current vs Supply
Voltage
2.0
MIN
ITH
2.5
= 0.6V)
SUPPLY VOLTAGE (V)
3.0
TYP
50
66
60
60
80
88
3.5 4.0
LTC1700
MAX
100
100
100
110
4.5 5.0 5.5
70
90
FB
to the
UNITS
1700 G03
3
6.0
ns
ns
ns
ns
ns
ns