Datasheet

2
LTC1504
ABSOLUTE MAXIMUM RATINGS
W
WW
U
(Note 1)
Supply Voltage (V
CC
to GND)................................... 10V
Peak Output Current (SW) .......................................±1A
Input Voltage (All Other Pins) ......... –0.3V to V
CC
+ 0.3V
Operating Temperature Range ..................... 0°C to 70°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
WU
U
PACKAGE
/
O
RDER I FOR ATIO
ORDER PART
NUMBER
1
2
3
4
8
7
6
5
TOP VIEW
COMP
SS
SHDN
FB/SENSE*
I
MAX

V
CC

SW
GND
S8 PACKAGE
8-LEAD PLASTIC SO
*FB FOR LTC1504CS8, SENSE FOR LTC1504CS8-3.3
LTC1504CS8
LTC1504CS8-3.3
T
JMAX
= 115°C, θ
JA
= 90°C/W
S8 PART MARKING
1504
15043
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS
V
CC
= 5V, T
A
= 25°C unless otherwise specified. (Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Minimum Supply Voltage (Note 7) ● 4V
V
FB
Feedback Voltage LTC1504CS8 ● 1.25 1.265 1.28 V
∆V
FB
Feedback Voltage PSRR Figure 1, 4V ≤ V
CC
≤ 10V, LTC1504CS8 ● 1.1 1.6 %
V
SENSE
Sense Pin Voltage LTC1504CS8-3.3 ● 3.20 3.30 3.40 V
∆V
SENSE
Sense Voltage PSRR Figure 1, 4V ≤ V
CC
≤ 10V, LTC1504CS8-3.3 ● 1.2 1.8 %
I
CC
Supply Current Figure 1, V
SHDN
= V
CC
, I
OUT
= 0 (Note 4) 3 mA
Figure 1, V
SHDN
= V
CC
, I
OUT
= 0, V
FB
/V
SENSE
= V
CC
(Note 4) ● 0.3 0.6 mA
V
SHDN
= 0V ● 1.0 20 µA
f
OSC
Internal Oscillator Frequency ● 150 200 250 kHz
R
SW
Internal Switch Resistance ● 1.3 2.0 Ω
V
IH
SHDN Input High Voltage ● 2.4 V
V
IL
SHDN Input Low Voltage ● 0.8 V
I
IN
SHDN Input Current ● ±0.1 ±1 µA
V
OH
Error Amplifier Positive Swing Figure 2 ● 4.5 4.95 V
V
OL
Error Amplifier Negative Swing Figure 2 ● 0.05 0.5 V
I
OH
, I
OL
Error Amplifier Output Current Figure 2 ● ±50 ±100 ±200 µA
g
mV
Error Amplifier Transconductance (Note 5) ● 350 600 1100 µmho
A
V
Error Amplifier DC Gain (Note 5) ● 40 48 dB
g
mI
I
LIM
Amplifier Transconductance (Note 6) 1000 2000 3000 µmho
I
MAX
I
MAX
Sink Current V
IMAX
= V
CC
● 81216 µA
I
SS
Soft Start Source Current V
SS
= 0V ● –8 –12 –16 µA
t
r
, t
f
Output Switch Rise/Fall Time ● 550 ns
DC
MAX
Maximum Duty Cycle V
COMP
= V
CC
● 84 90 %