LTC1553
ABSOLUTE
MAXIMUM
RATINGS
(Note 1)
PACKAGE/ORDER INFORMATION
TOP VIEW
G2
PV
CC
GND
SGND
V
CC
SENSE
I
MAX
I
FB
SS
1
2
3
4
5
6
7
8
9
20 G1
19 OUTEN
18 VID0
17 VID1
16 VID2
15 VID3
14 VID4
13 PWRGD
12 FAULT
11 OT
Supply Voltage
V
CC
........................................................................ 9V
PV
CC
................................................................... 20V
Input Voltage
I
FB
(Note 2) ............................................ PV
CC
+ 0.3V
I
MAX
...................................................... – 0.3V to 13V
All Other Inputs ......................... – 0.3V to V
CC
+ 0.3V
Digital Output Voltage ............................... – 0.3V to 13V
I
FB
Input Current (Notes 2, 3) .......................... – 100mA
Operating Temperature Range ..................... 0°C to 70°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................. 300°C
ORDER PART
NUMBER
LTC1553CG
LTC1553CSW
COMP 10
G PACKAGE
SW PACKAGE
20-LEAD PLASTIC SSOP 20-LEAD PLASTIC SO
T
JMAX
= 125°C,
θ
JA
= 100°C/ W (G)
T
JMAX
= 125°C,
θ
JA
= 100°C/ W (SW)
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS
SYMBOL
V
CC
PV
CC
V
FB
V
OUT
PARAMETER
Supply Voltage
Supply Voltage for G1, G2
Internal Feedback Voltage
1.8V Initial Output Voltage
2.8V Initial Output Voltage
3.5V Initial Output Voltage
1.8V Initial Output Voltage
2.8V Initial Output Voltage
3.5V Initial Output Voltage
Output Load Regulation
Output Line Regulation
Positive Power Good Trip Point
Negative Power Good Trip Point
FAULT Trip Point
Operating Supply Current
Shutdown Supply Current
Supply Current
Internal Oscillator Frequency
V
COMP
at Minimum Duty Cycle
V
COMP
at Maximum Duty Cycle
Error Amplifier Open-Loop DC Gain
Error Amplifier Transconductance
Error Amplifier –3dB Bandwidth
(Note 4)
CONDITIONS
V
CC
= 5V, PV
CC
= 12V, T
A
= 25°C, unless otherwise noted. (Note 3)
MIN
q
q
TYP
MAX
8
18
UNITS
V
V
V
mV
mV
mV
mV
mV
mV
mV
mV
4.5
1.265
– 27 (– 1.5%)
– 42 (– 1.5%)
– 52 (– 1.5%)
– 36 (– 2%)
– 56 (– 2%)
– 70 (– 2%)
–5
±1
With Respect to Rated Output Voltage (Figure 2)
q
q
q
27 (+ 1.5%)
42 (+ 1.5%)
52 (+ 1.5%)
36 (+ 2%)
56 (+ 2%)
70 (+ 2%)
∆V
OUT
V
PWRGD
V
FAULT
I
CC
I
PVCC
f
OSC
V
SAWL
V
SAWH
G
ERR
g
mERR
BW
ERR
I
OUT
= 0 to 14A (Note 4) (Figure 2)
V
IN
= 4.75V to 5.25V, I
OUT
= 0 (Note 4)(Figure 2)
% Above Output Voltage (Figure 2)
% Below Output Voltage (Figure 2)
% Above Output Voltage (Figure 2)
OUTEN = V
CC
= 5V (Note 5) (Figure 3)
OUTEN = 0, VID0 to VID4 Floating (Figure 3)
PV
CC
= 12V, OUTEN = V
CC
(Note 6) (Figure 3)
PV
CC
= 12V, OUTEN = 0, VID0 to VID4 Floating
(Figure 4)
(Note 4)
(Note 4)
(Note 7)
(Note 7)
COMP = Open (Note 4)
q
q
q
q
q
q
q
q
–7
12
5
–5
15
800
130
15
1
7
20
1200
250
250
300
1.8
2.8
350
40
0.9
53
1.6
400
2.3
millimho
kHz
2
U
W
U
U
W W
W
%
%
%
µA
µA
mA
µA
kHz
V
V
dB
LINER [ LINEAR TECHNOLOGY ]
