LTC1553 Datasheet, PDF (2/24 Pages) Linear Technology – 5-Bit Programmable Synchronous Switching Regulator Controller for Pentium II Processor

LTC1553
ABSOLUTE MAXIMUM RATINGS
(Note 1)
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
PACKAGE/ORDER INFORMATION
TOP VIEW
G2 1
PV_CC 2
GND 3
SGND 4
V_CC 5
SENSE 6
I_MAX 7
I_FB 8
SS 9
COMP 10
20 G1
19 OUTEN
18 VID0
17 VID1
16 VID2
15 VID3
14 VID4
13 PWRGD
12 FAULT
11 OT
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)
ORDER PART
NUMBER
LTC1553CG
LTC1553CSW
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS V_CC = 5V, PV_CC = 12V, T_A = 25°C, unless otherwise noted. (Note 3)
SYMBOL
V_CC
PV_CC
V_FB
V_OUT
∆V_OUT
V_PWRGD
V_FAULT
I_CC
I_PVCC
f_OSC
V_SAWL
V_SAWH
G_ERR
g_mERR
BW_ERR
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
CONDITIONS
(Note 4)
With Respect to Rated Output Voltage (Figure 2)
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)
MIN
TYP MAX
UNITS
q
4.5
8
V
q
18
V
1.265
V
– 27 (– 1.5%)
– 42 (– 1.5%)
– 52 (– 1.5%)
q – 36 (– 2%)
q – 56 (– 2%)
q – 70 (– 2%)
27 (+ 1.5%)
mV
42 (+ 1.5%)
mV
52 (+ 1.5%)
mV
36 (+ 2%)
mV
56 (+ 2%)
mV
70 (+ 2%)
mV
–5
mV
±1
mV
q
5
7
%
q
–7
–5
%
q
12
15
20
%
q
800 1200
µA
q
130
250
µA
15
mA
1
µA
q
250
300
350
kHz
1.8
V
2.8
V
q
40
53
dB
q
0.9
1.6
2.3 millimho
400
kHz
2