LTC3730_15 Datasheet, PDF (2/28 Pages) Linear Technology – 3-Phase, 5-Bit Intel Mobile VID, 600kHz, Synchronous Buck Controller

LTC3730
ABSOLUTE AXI U RATI GS
(Note 1)
Topside Driver Voltage (BOOST_N) Range .. 38V to –0.3V
Switch Voltage (SW_N) Range ........................ 32V to –5V
Boosted Driver Voltage (BOOST_N – SW_N) .... 7V to –0.3V
Peak Output Current <1ms (TG_N, BG_N) ..................... 5A
Supply Voltage (V_CC), PGOOD
Pin Voltage Range ....................................... 7V to –0.3V
PLLIN, RUN/SS, PLLFLTR, FCB Voltages .. V_CC to –0.3V
I_TH Voltage Range ..................................... 2.4V to –0.3V
Operating Ambient Temperature Range ....... 0°C to 70°C
Junction Temperature (Notes 2, 7) ....................... 125°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
VID1 1
PLLIN 2
PLLFLTR 3
FCB 4
IN⁺ 5
IN^– 6
AMPOUT 7
EAIN 8
SGND 9
SENSE1⁺ 10
SENSE1^– 11
SENSE2⁺ 12
SENSE2^– 13
SENSE3^– 14
SENSE3⁺ 15
RUN/SS 16
I_TH 17
VID2 18
36 VID0
35 PGOOD
34 BOOST1
33 TG1
32 SW1
31 BOOST2
30 TG2
29 SW2
28 V_CC
27 BG1
26 PGND
25 BG2
24 BG3
23 SW3
22 TG3
21 BOOST3
20 VID4
19 VID3
ORDER PART
NUMBER
LTC3730CG
G PACKAGE
36-LEAD PLASTIC SSOP
T_JMAX = 125°C, θ_JA = 95°C/W
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_CC = V_RUN/SS = 5V unless otherwise noted.
SYMBOL
PARAMETER
Main Control Loop
V_REGULATED Regulated Voltage at IN⁺
CONDITIONS
(Note 3); VID Code = 11111, V_ITH = 1.2V
V_SENSEMAX
I_MATCH
V_LOADREG
V_REFLNREG
g_m
g_mOL
V_FCB
I_FCB
V_BINHIBIT
UVR
Maximum Current Sense Threshold
Maximum Current Threshold Match
Output Voltage Load Regulation
Output Voltage Line Regulation
Transconductance Amplifier g_m
Transconductance Amplifier GBW
Forced Continuous Threshold
FCB Bias Current
Burst Inhibit Threshold
Undervoltage RUN/SS Reset
V_EAIN = 0.5V, V_ITH Open,
V_SENSE1–_, V_SENSE2–_, V_SENSE3– = 0.6V, 1.8V
Worst-Case Error at V_SENSE(MAX)
(Note 3)
Measured in Servo Loop, ∆I_TH Voltage = 1.2V to 0.7V
Measured in Servo Loop, ∆I_TH Voltage = 1.2V to 2V
V_CC = 4.5V to 7V
I_TH = 1.2V, Sink/Source 25µA (Note 3)
I_TH = 1.2V, (g_m • Z_L, Z_L = Series 1k-100kΩ-1nF)
V_FCB = 0.65V
Measured at FCB pin
V_CC Lowered Until the RUN/SS Pin is Pulled Low
MIN TYP MAX UNITS
0.596 0.600 0.604
V
● 0.594 0.600 0.606
V
65
75
85
mV
● 62
75
88
mV
–5
5
%
●
0.1
0.5
%
●
–0.1 –0.5
%
0.03
%/V
● 3.6
5
6.6 mmho
3
MHz
● 0.58 0.60 0.62
V
0.2
0.7
µA
V_CC – 1.5 V_CC – 0.7 V_CC – 0.3
V
3.2
3.8
4.5
V
3730fa
2