LT1769
ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 16V, VBAT = 8V, RS2 = RS3 = 200Ω (see Block Diagram),
CLN = VCC. No load on any outputs unless otherwise noted.
V
PARAMETER
Overall
CONDITIONS
MIN
TYP
MAX
UNITS
V
Undervoltage Lockout (Switch OFF) Threshold
Measured at UV Pin
●
●
●
●
6
7
8
5
V
µA
V
CC
UV Pin Input Current
0.2V ≤ V ≤ 8V
0.1
0.1
0.1
3
UV
UV Output Voltage at UV
Pin
In Undervoltage State, I
= 70µA
0.5
3
OUT
UVOUT
UV Output Leakage Current at UV
Pin
8V ≤ V , V
= 5V
µA
µA
OUT
UV UVOUT
Reverse Current from Battery (When V Is
V
≤ 20V, V ≤ 0.4V
15
CC
BAT
UV
Not Connected, V Is Floating)
SW
Boost Pin Current
V
V
= 20V, V
= 28V, V
BOOST
BOOST
= 0V
= 0V
0.1
0.25
6
10
20
9
µA
µA
mA
mA
CC
CC
BOOST
BOOST
2V ≤ V
8V ≤ V
– V < 8V (Switch ON)
– V ≤ 25V (Switch ON)
CC
8
12
CC
Switch
Switch ON Resistance
8V ≤ V ≤ V
, I = 2A,
CC
MAX SW
V
V
V
– V ≥ 2V
●
0.15
25
0.25
35
Ω
BOOST
SW
∆I /∆I During Switch ON
BOOST SW
= 24V, I ≤ 2A
mA/A
BOOST
SW
Switch OFF Leakage Current
= 0V, V ≤ 20V
●
●
2
4
100
200
µA
µA
SW
CC
20V < V ≤ 28V
CC
Minimum I
Minimum I
for Switch ON
for Switch OFF
for Switch ON
2
1
4
20
µA
mA
V
PROG
PROG
●
●
2.4
Maximum V
V
– 2
BAT
CC
Current Sense Amplifier CA1 Inputs (Sense, BAT)
Input Bias Current
●
●
●
–50
–125
µA
V
Input Common Mode Low
Input Common Mode High
SPIN Input Current
–0.25
V
– 2
V
CC
–100
2.465
–200
µA
Reference
Reference Voltage (Note 3)
R
= 4.93k, Measured at OVP with
PROG
VA Supplying I
and Switch OFF
2.448
2.477
V
PROG
Reference Voltage
All Conditions of V , T ≥ 0°C
●
●
2.441
2.43
2.489
2.489
V
V
CC
A
T < 0°C (Note 4)
A
Oscillator
Switching Frequency
Switching Frequency
180
200
200
220
kHz
All Conditions of V , T ≥ 0°C
●
●
170
160
230
230
kHz
kHz
CC
A
T < 0°C
A
Maximum Duty Cycle
90
85
93
%
%
●
Current Amplifier CA2
Transconductance
V = 1V, I = ±1µA
150
250
550
0.6
µmho
C
VC
Maximum V for Switch OFF
●
V
C
I
Current (Out of Pin)
V ≥ 0.6V
V < 0.45V
C
100
3
µA
mA
VC
C
1769fa
3
Linear Systems [ Linear Systems ]
