LTC3829 Datasheet, PDF (3/40 Pages) Linear Technology – 3-Phase, Single Output Synchronous Step-Down DC/DC Controller with Diffamp

LTC3829
Order Information (Note 2)
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3829EUHF#PBF
LTC3829EUHF#TRPBF 3829
38-Lead (5mm × 7mm) Plastic QFN
–40°C to 125°C
LTC3829IUHF#PBF
LTC3829IUHF#TRPBF 3829
38-Lead (5mm × 7mm) Plastic QFN
–40°C to 125°C
LTC3829EFE#PBF
LTC3829EFE#TRPBF
LTC3829
38-Lead Plastic TSSOP
–40°C to 125°C
LTC3829IFE#PBF
LTC3829IFE#TRPBF
LTC3829
38-Lead Plastic TSSOP
–40°C to 125°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/
Electrical Characteristics The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T_A = 25°C. V_IN = 15V, V_RUN = 5V, unless otherwise noted. (Note 2)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
V_IN
V_OUT
V_FB
I_FB
V_REFLNREG
V_LOADREG
Input Voltage Range
Output Voltage Range
Regulated Feedback Voltage
Feedback Current
Reference Voltage Line Regulation
Output Voltage Load Regulation
g_m
I_Q
DF_MAX
UVLO
UVLO Hyst
Transconductance Amplifier g_m
Input DC Supply Current
Normal Mode
Shutdown
Maximum Duty Factor
Undervoltage Lockout
UVLO Hysteresis
I_TH Voltage = 1.2V (Note 4) –40°C to 85°C l
I_TH Voltage = 1.2V (Note 4) T_J = 125°C l
(Note 4)
V_IN = 4.5V to 38V (Note 4)
(Note 4)
Measured in Servo Loop,
l
∆I_TH Voltage = 1.2V to 0.7V
Measured in Servo Loop,
l
∆I_TH Voltage = 1.2V to 1.6V
I_TH = 1.2V, Sink/Source 5µA (Note 4)
(Note 5)
V_IN = 15V
V_RUN = 0V
In Dropout, f_OSC = 500kHz
V_INTVCC Ramping Down
l
4.5
0.6
0.5955
0.593
93
3.0
0.600
0.600
–15
0.002
0.01
–0.01
2.2
4
40
94
3.3
0.6
38
5.0
0.6045
0.607
–50
0.02
0.1
–0.1
60
3.6
V_OVL
I_SENSE1,2,3+
I_TEMP
I_TK/SS
V_RUN
Feedback Overvoltage Lockout
SENSE⁺ Pins Bias Current
DCR Tempco Compensation Current
Soft-Start Charge Current
RUN Pin On Threshold
RUN Pin On Hysteresis
Measured at V_FB
Each Channel, V_SENSE1,2,3 = 3.3V,
V_DIFFP = 3.3V
V_ITEMP = 0.2V
V_TK/SS = 0V
V_RUN Rising
l 0.64
0.66
0.68
l
±1
±2
l
9
l
1.0
l
1.1
10
11
1.25
1.5
1.22
1.35
100
V_SENSE(MAX) Maximum Current Sense Threshold
(E-Grade)
Maximum Current Sense Threshold
(I-Grade)
V_FB = 0.5V, V_SENSE1,2,3 = 3.3V
I_LIM = 0V
I_LIM = Float
I_LIM = INTV_CC
V_FB = 0.5V, V_SENSE1,2,3 = 3.3V
I_LIM = 0V
I_LIM = Float
I_LIM = INTV_CC
l
25
30
35
l
45
50
55
l
68
75
82
l
23
30
37
l
43
50
57
l
66
75
84
UNITS
V
V
V
V
nA
%/V
%
%
mmho
mA
µA
%
V
V
V
µA
µA
µA
V
mV
mV
mV
mV
mV
mV
mV
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