LTC3714_15 Datasheet, PDF (2/28 Pages) Linear Technology – Intel Compatible, Wide Operating Range, Step-Down Controller with Internal Op Amp

LTC3714
Absolute Maximum Ratings
(Note 1)
Input Supply Voltage (V_IN), I_ON................... 36V to –0.3V
Boosted Topside Driver Supply Voltage
(BOOST).................................................... 42V to –0.3V
SW, SENSE Voltages..................................... 36V to –5V
EXTV_CC, (BOOST – SW), RUN/SS, VID0-VID4,
PGOOD, FCB Voltages................................. 7V to –0.3V
V_ON, V_RNG Voltages.................. (INTV_CC + 0.3V) to –0.3V
I_TH, V_FB, V_OSENSE Voltages........................ 2.7V to –0.3V
TG, BG, INTV_CC, EXTV_CC Peak Currents..................... 2A
TG, BG, INTV_CC, EXTV_CC RMS Currents................ 50mA
OPV_IN, OP⁺, OP^–...............................................0V to 18V
Operating Ambient Temperature Range
LTC3714EG (Note 2)............................. –40°C to 85°C
Junction Temperature (Note 3)............................. 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................... 300°C
Pin Configuration
BG 1
PGND 2
SENSE 3
SW 4
TG 5
BOOST 6
VID0 7
VID1 8
VID2 9
RUN/SS 10
V_ON 11
PGOOD 12
V_RNG 13
I_TH 14
TOP VIEW
28 INTV_CC
27 V_IN
26 EXTV_CC
25 VID4
24 VID3
23 V_OSENSE
22 VFB
21 I_ON
20 FCB
19 SGND
18 OPOUT
17 OP ⁺
16 OP ^–
15 OPV_IN
ORDER PART
NUMBER
LTC3714EG
G PACKAGE
28-LEAD PLASTIC SSOP
T_JMAX = 125°C, θ_JA = 130°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Electrical Characteristics 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 noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
Main Control Loop
I_Q
Input DC Supply Current
Normal
Shutdown Supply Current
900 2000
15
30
V_FB
Feedback Reference Voltage
I_TH = 1.2V (Note 4)
l 0.594 0.600 0.606
∆V_FB(LINEREG) Feedback Voltage Line Regulation
V_IN = 4V to 30V (Note 4), I_TH = 1.2V
0.002
∆V_FB(LOADREG)
g_m(EA)
V_FCB
I_FCB
t_ON
Feedback Voltage Load Regulation
Error Amplifier Transconductance
Forced Continuous Threshold
Forced Continuous Current
On-Time
I_TH = 0.5V to 1.9V (Note 4)
I_TH = 1.2V (Note 4)
V_FCB = 0.6V
I_ON = 60µA, V_ON = 1.5V
l
–0.05 –0.3
l 1.4
1.7
2
l 0.57 0.6 0.63
–1
–2
200 250 300
t_ON(MIN)
Minimum On-Time
I_ON = 180µA, V_ON = 0V
50
100
t_OFF(MIN)
V_SENSE(MAX)
Minimum Off-Time
Maximum Current Sense Threshold
I_ON = 60µA, V_ON = 1.5V
V_RNG = 1V, V_FB = 0.56V
V_RNG = 0V, V_FB = 0.56V
V_RNG = INTV_CC, V_FB = 0.56V
250 400
l 113 133 153
l 79
93
107
l 158 186 214
V_SENSE(MIN)
∆V_FB(OV)
Minimum Current Sense Threshold
Output Overvoltage Fault Threshold
V_RNG = 1V, V_FB = 0.64V
V_RNG = 0V, V_FB = 0.64V
V_RNG = INTV_CC, V_FB = 0.64V
–67
–33
–93
7.5
10 12.5
∆V_FB(UV)
Output Undervoltage Fault Threshold
340 400 460
V_RUN/SS(ON)
RUN Pin Start Threshold
l 0.8
1.5
2
UNITS
µA
µA
V
%/V
%
ms
V
µA
ns
ns
ns
mV
mV
mV
mV
mV
mV
%
mV
V
3714f
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