LT1769 データシートの表示（PDF） - Linear Technology
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LT1769
Linear Technology
LT1769 Datasheet PDF : 16 Pages
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LT1769
ELECTRICAL CHARACTERISTICS The q 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),
VCLN = VCC. No load on any outputs unless otherwise noted.
PARAMETER
Overall
VCC Undervoltage Lockout (Switch OFF) Threshold
UV Pin Input Current
UV Output Voltage at UVOUT Pin
UV Output Leakage Current at UVOUT Pin
Reverse Current from Battery (When VCC Is
Not Connected, VSW Is Floating)
Boost Pin Current
Switch
Switch ON Resistance
∆IBOOST/∆ISW During Switch ON
Switch OFF Leakage Current
Minimum IPROG for Switch ON
Minimum IPROG for Switch OFF
Maximum VBAT for Switch ON
Current Sense Amplifier CA1 Inputs (Sense, BAT)
Input Bias Current
Input Common Mode Low
Input Common Mode High
SPIN Input Current
Reference
Reference Voltage (Note 3)
Reference Voltage
Oscillator
Switching Frequency
Switching Frequency
Maximum Duty Cycle
Current Amplifier CA2
Transconductance
Maximum VC for Switch OFF
IVC Current (Out of Pin)
CONDITIONS
Measured at UV Pin
0.2V ≤ VUV ≤ 8V
In Undervoltage State, IUVOUT = 70µA
8V ≤ VUV, VUVOUT = 5V
VBAT ≤ 20V, VUV ≤ 0.4V
VCC = 20V, VBOOST = 0V
VCC = 28V, VBOOST = 0V
2V ≤ VBOOST – VCC < 8V (Switch ON)
8V ≤ VBOOST – VCC ≤ 25V (Switch ON)
8V ≤ VCC ≤ VMAX, ISW = 2A,
VBOOST – VSW ≥ 2V
VBOOST = 24V, ISW ≤ 2A
VSW = 0V, VCC ≤ 20V
20V < VCC ≤ 28V
RPROG = 4.93k, Measured at OVP with
VA Supplying IPROG and Switch OFF
All Conditions of VCC, TA ≥ 0°C
TA < 0°C (Note 4)
All Conditions of VCC, TA ≥ 0°C
TA < 0°C
VC = 1V, IVC = ±1µA
VC ≥ 0.6V
VC < 0.45V
MIN TYP MAX
q
6
7
8
q
0.1
5
q
0.1
0.5
q
0.1
3
3
15
0.1
10
0.25 20
6
9
8
12
q
0.15 0.25
25
35
q
2
100
q
4
200
2
4
20
q
1
2.4
q
VCC – 2
q
– 50 – 125
q – 0.25
q
VCC – 2
– 100 – 200
2.448 2.465 2.477
q 2.441
q 2.43
2.489
2.489
180 200 220
q
170
200
230
q
160
230
90
93
q
85
150 250 550
q
0.6
100
3
UNITS
V
µA
V
µA
µA
µA
µA
mA
mA
Ω
mA/A
µA
µA
µA
mA
V
µA
V
V
µA
V
V
V
kHz
kHz
kHz
%
%
µmho
V
µA
mA
1769fa
3
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