EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC3823EGN#PBF
LTC3823IGN#PBF
LTC3823EUH#PBF
LTC3823IUH#PBF
TAPE AND REEL
LTC3823EGN#TRPBF
LTC3823IGN#TRPBF
LTC3823EUH#TRPBF
LTC3823IUH#TRPBF
PART MARKING*
LTC3823EGN
LTC3823IGN
3823
3823
PACKAGE DESCRIPTION
28-Lead Plastic SSOP Narrow
28-Lead Plastic SSOP Narrow
32-Lead (5mm
×
5mm) Plastic QFN
32-Lead (5mm
×
5mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
3823fd
2
LTC3823
ELECTRICAL CHARACTERISTICS
SYMBOL
I
Q
V
FB
V
FB(LINEREG)
V
FB(LOADREG)
V
RUN
I
SS/TRACK
I
FB
g
m(EA)
V
FCB
I
FCB
t
ON
t
ON(MIN)
t
OFF(MIN)
V
SENSE(MAX)
PARAMETER
Input DC Supply Current
Feedback Voltage Accuracy (Note 3)
Feedback Voltage Line Regulation
Feedback Voltage Load Regulation
RUN Pin On Threshold
Soft-Start Charge Current
Feedback Pin Input Current
Error Amplifier Transconductance
Forced Continuous Threshold
Forced Continuous Pin Current
On-Time
Minimum On-Time
Minimum Off-Time
Maximum Current Sense Threshold
V
RNG
= 1V, V
FB
= 570mV (0°C to 85°C)
V
RNG
= 0V, V
FB
= 570mV (0°C to 85°C)
V
RNG
= INTV
CC
, V
FB
= 570mV (0°C to 85°C)
V
RNG
= 1V, V
FB
= 630mV
V
RNG
= 0V, V
FB
= 630mV
V
RNG
= INTV
CC
, V
FB
= 630mV
8
V
IN
Falling
V
IN
Rising
TG High
TG Low
BG High
BG Low
C
LOAD
= 3300pF
C
LOAD
= 3300pF
C
LOAD
= 3300pF
C
LOAD
= 3300pF
6V < V
IN
< 36V
I
CC
= 0mA to 20mA
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 15V unless otherwise specified.
CONDITIONS
Normal Operation
Shutdown Supply Current
I
TH
= 1.2V (0°C to 85°C)
I
TH
= 1.2V
V
IN
= 4.5V to 30V, I
TH
= 1.2V (Note 3)
I
TH
= 0.5V to 1.9V (Note 3)
V
RUN
Rising
V
SS/TRACK
= 0V
I
TH
= 1.2V (Note 3)
V
FCB
= 0V
I
ON
= –60μA, V
ON
= 1.5V
I
ON
= –60μA, V
ON
= 0V
I
ON
= –180μA, V
ON
= 0V
120
50
240
210
80
l
l
l
MIN
TYP
1400
30
MAX
2200
50
0.604
0.606
–0.3
1.9
–2.3
100
0.63
–2
290
150
100
400
160
85
320
UNITS
μA
μA
V
V
%/V
%
V
μA
nA
mS
V
μA
ns
ns
ns
ns
mV
mV
mV
mV
mV
mV
Main Control Loop
0.596
0.594
0.6
0.6
0.002
–0.04
1
–1.3
–100
0.57
1.5
–1.7
–20
1.65
0.6
–1
250
115
50
280
140
70
280
– 60
– 30
–120
11
3.1
3.9
1.9
1.2
1.9
0.7
20
20
20
20
V
SENSE(MIN)
Minimum Current Sense Threshold
ΔV
FB(OV)
V
IN(UVLO+)
V
IN(UVLO–)
TG R
UP
TG R
DOWN
BG R
UP
BG R
DOWN
TG t
r
TG t
f
BG t
r
BG t
f
V
INTVCC
ΔV
LDO(LOADREG)
R
PLLIN
I
PLLFLTR
Output Overvoltage Fault Threshold Offset
Undervoltage Lockout
Undervoltage Lockout
TG Driver Pull-Up On-Resistance
TG Driver Pull-Down On-Resistance
BG Driver Pull-Up On-Resistance
BG Driver Pull-Down On-Resistance
TG Rise Time
TG Fall Time
BG Rise Time
BG Fall Time
Internal V
CC
Voltage
Internal V
CC
Load Regulation
PLLIN Input Resistance
Phase Detector Sink Current
Phase Detector Source Current
f
PLLIN
< f
O
f
PLLIN
> f
O
14
3.4
4.1
2.5
2.5
3
1.5
%
V
V
Ω
Ω
Ω
Ω
ns
ns
ns
ns
Internal V
CC
Regulation
4.75
5
– 0.1
50
–15
15
5.45
±2
V
%
kΩ
μA
μA
Phase-Locked Loop
3823fd
3
LTC3823
ELECTRICAL CHARACTERISTICS
SYMBOL
PGOOD Output
ΔV
FBH
ΔV
FBL
ΔV
FB(HYS)
V
PGL
A
DA
R
IN
V
OS
PSRR
OA
I
CL
V
OUT(MAX)
GBW
T
SD
T
HYST
PGOOD Upper Threshold
PGOOD Lower Threshold
PGOOD Hysteresis
PGOOD Low Voltage
Gain
Input Resistance
Input Offset Voltage
Power Supply Rejection Ratio
Maximum Output Current
Maximum Output Voltage
Gain Bandwidth Product
Shutdown Temperature
Thermal Hysteresis
I
DIFFOUT
= 300μA
I
DIFFOUT
= 1mA
Rising
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 15V unless otherwise specified.
PARAMETER
CONDITIONS
V
FB
Rising
V
FB
Falling
V
FB
Returning
I
PGOOD
= 5mA
l
MIN
8
–8
TYP
11
–11
1.5
0.15
MAX
14
–14
3
0.4
1.0035
2
UNITS
%
%
%
V
V/V
kΩ
mV
dB
mA
V
MHz
°C
°C
Differential Sensing Amplifier
0.9965
1.000
80
Measured at V
OUTSENSE+
Input
V
OUTSENSE+
= V
DIFFOUT
= 1.5V,
I
DIFFOUT
= 1mA
6V < V
IN
< 30V
3.775
90
3
4
3.5
170
15
Thermal Shutdown
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:
T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formulas:
LTC3823GN: T
J
= T
A
+ (P
D
• 80°C/W)
LTC3823UH: T
J
= T
A
+ (P
D
• 34°C/W)
Note 3:
The LTC3823 is tested in a feedback loop that servos V
FB
to
achieve a specified error amplifier output voltage (I
TH
).
Note 4:
The LTC3823E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3823I is guaranteed over the full
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