LT8697
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Notes 2, 4)
PARAMETER
USB5V Current
Current Sense Voltage (V
ISP
– V
ISN
)
CONDITIONS
V
ISN
= 5V, V
ISP
– V
ISN
= 40mV, R
CBL
= 13.7k
V
ISN
= 5V, V
ISP
– V
ISN
= 10mV, R
CBL
= 13.7k
V
ISN
= 5V, V
ISP
– V
ISN
= 0V, R
CBL
= 13.7k
R
CBL
= Open
V
CTRL
= 1.5V, V
ISN
= 5V
V
CTRL
= 1.5V, V
ISN
= 0V
V
CTRL
= 800mV, V
ISN
= 5V
V
CTRL
= 800mV, V
ISN
= 0V
V
CTRL
= 200mV, V
ISN
= 5V
V
CTRL
= 200mV, V
ISN
= 0V
V
ISP
– V
ISN
= 40mV, R
CBL
= 13.7k
V
ISP
– V
ISN
= 10mV, R
CBL
= 13.7k
V
ISP
– V
ISN
= 50mV, V
RCBL
= 0V
V
ISP
= V
ISN
= 0V, 5V
V
ICTRL
= 1.5V
V
SYS
= 0V, 5V
2.6
V
IN
= 12V
V
SYS
= 5V, R
T
= 56.2k
V
SYS
= 5V, I
LOAD
= 2.1A
96
I
LOAD
= 1A
I
LOAD
= 0.5A
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
elecTrical characTerisTics
MIN
58
12
0
0
45.5
44.5
37.5
36
6
5
720
130
–2
–20
–0.5
TYP
60
15
2
1
48
48.5
39.5
40
9.5
10
800
205
–3
–2
3.4
2.9
5.8
7.5
4
450
97.5
45
80
7
300
700
2.00
120
4.8
65
4.5
0.1
1.0
40
MAX
62
23
8
2
50
53
42
44.5
13
15
880
280
–4
20
–3
3.15
5.92
5
99
70
110
7.9
340
750
2.05
6
5.8
5
1.06
20
UNIT
µA
µA
µA
µA
mV
mV
mV
mV
mV
mV
mV
mV
mA
µA
µA
V
V
V
V
mA
mV
%
ns
ns
V
kHz
kHz
MHz
mΩ
A
mΩ
A
µA
V
mV
nA
%
%
%
Ω
µs
V
V
nA
µA
Ω
8697p
RCBL Monitor Voltage
RCBL Output Current Limit
ISP, ISN Bias Current
ICTRL Current
INTV
CC
Voltage
INTV
CC
Undervoltage Lockout
SYS Voltage
SYS Voltage to Disable Forced Continuous Mode
SYS Current in Regulation
Dropout Voltage (V
IN
– V
SYS
)
Maximum Duty Cycle in Dropout
Minimum On-Time
Minimum Off-Time
Oscillator Frequency
5.63
3
l
30
50
6.2
250
620
1.9
3.2
3.5
Minimum V
IN
for SYS Regulation at Full Frequency R
T
= 16.5k, V
USB5V
= 0V, I
LOAD
= 0.5A
R
T
= 140k
R
T
= 56.2k
R
T
= 16.5k
I
SW
= 1A
Top Power NMOS On-Resistance
Top Power NMOS Current Limit
Bottom Power NMOS On-Resistance
Bottom Power NMOS Current Limit
SW Leakage Current
EN/UV Threshold
EN/UV Hysteresis
EN/UV Bias Current
PG Upper Threshold Offset from V
USB5V
PG Lower Threshold Offset from V
USB5V
PG Hysteresis
PG Pull-Down Resistance
PG Transition Delay
SYNC Threshold
SYNC Current
TR/SS Current
TR/SS Pull-Down Resistance
l
V
INTVCC
= 3.4V, I
SW
= 1A
V
INTVCC
= 3.4V
V
IN
= 42V, V
SW
= 0V, 42V
V
EN/UV
Rising
V
EN/UV
= 2V
V
USB5V
Falling
V
USB5V
Rising
V
PG
= 0.1V
V
USB5V
from 5V to 4V
V
SYNC
Falling
V
SYNC
Rising
V
SYNC
= 2V
V
TR/SS
= 0V
Fault Condition, V
TR/SS
= 0.1V
0.8
1.6
–40
–1.2
l
l
l
0.94
–20
6
–6
9
–9
1.3
680
40
1.1
2.0
–2.2
230
12
–12
2000
1.4
2.4
40
–3.2
l
For more information
3
LINEAR_DIMENSIONS [ LINEAR DIMENSIONS SEMICONDUCTOR ]
