Datasheet

LT4430
3
4430fc
For more information www.linear.com/LT4430
The ● denotes the specifications which apply over the full operating junction
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 5V, FB = V
FB
, COMP = 1V, unless otherwise noted (Note 3).
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: The LT4430 is tested under pulsed load conditions such that T
J
≈ T
A
.
The LT4430E is guaranteed to meet specifications from 0°C to 125°C
junction temperature. Specifications over the –40°C to 125°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LT4430I is guaranteed
over the –40°C to 125°C operating junction temperature range, the
LT4430H is guaranteed over the –40°C to 150°C operating junction
temperature range and the LT4430MP is tested and guaranteed over
the –55°C to 150°C operating junction temperature range. High junction
temperatures degrade operating lifetimes; operating lifetime is derated
for junction temperatures greater than 125°C. Note that the maximum
ambient temperature consistent with these specifications is determined by
specific operating conditions in conjunction with board layout, the
rated
package thermal impedance and other environmental factors.
Note 3:
All currents into device pins are positive. All currents out of device
pins are negative. All voltages are referenced to GND unless otherwise
specified.
Note 4: This parameter is guaranteed by correlation and is not tested.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
OC
Overshoot Control Charging Current V
OC
= 0V (E-, I-Grades)
V
OC
= 0V (H-Grade)
V
OC
= 0V (MP-Grade)
●
●
●
–15
–17
–17
–8.5
–8.5
–8.5
–5
–5
–4
µA
µA
µA
OC Clamp Voltage 0.93 V
OC Amplifier Offset V
oltage FB = 0.3V 48 mV
A
VOL
Error Amplifier Open-Loop DC Gain V
COMP
= 0.8V to 1V (E-, I-Grades)
V
COMP
= 0.8V to 1V (H-, MP-Grades)
●
●
60
55
80
80
dB
dB
Error Amplifier Unity-Gain Bandwidth No Load (Note 4) 9 MHz
Error Amplifier Output Swing Low FB = 1V
●
0.1 0.35 0.55 V
Error Amplifier Output Swing High FB = 0V (E-, I-Grades)
FB = 0V (H-Grade)
FB = 0V (MP-Grade)
●
●
●
1.2
1.2
1.15
1.33
1.33
1.33
1.5
1.55
1.55
V
V
V
Error Amplifier Output Source Current
FB = 0V, COMP = 1V (E-, I-Grades)
FB = 0V, COMP = 1V (H-Grade)
FB = 0V, COMP = 1V (MP-Grade)
●
●
●
–800
–825
–825
–450
–450
–450
–225
–225
–200
µA
µA
µA
Error Amplifier Output Sink Current FB = 1V, COMP = 1V 25 mA
Opto Driver Inverting DC Gain –6.4
–6 –5.6 V/V
Opto Driver –3dB Bandwidth No Load (Note 4) 600 kHz
Opto Driver Output Swing Low FB = 0V, COMP = Open (E-, I-Grades)
FB = 0V, COMP = Open (H-, MP-Grades)
●
●
0.5
0.5
0.85
0.9
V
V
Opto Driver Output Swing High V
IN
= 3V, FB = 1V, COMP = Open,
I
OPTO
= 10mA (E-, I-, H-Grades)
V
IN
= 3V, FB = 1V, COMP = Open,
I
OPTO
= 10mA (MP-Grade)
●
●
V
IN
– 1.25
V
IN
– 1.3
V
IN
– 1.05
V
IN
– 1.05
V
V
Opto Driver Output Swing High V
IN
= 20V, FB = 1V, COMP = Open,
I
OPTO
= 10mA
●
4.2 5.6 7.5 V
I
SC
Opto Driver Output
Short-Circuit Current (Sourcing)
FB = 1V, COMP = Open, OPTO = 0V
(E-, I-, H-Grades)
FB = 1V
, COMP = Open, OPTO = 0V
(MP-Grade)
●
●
10.5
9.5
22
22
45
45
mA
mA
Opto Driver Output Sink Current FB = 0V, OPTO = 1.5V (E-, I-, H-Grades)
FB = 0V, OPTO = 1.5V (MP-Grade)
●
●
150
135
350
350
650
650
µA
µA
elecTrical characTerisTics