LTC3734_15 Datasheet, PDF (2/28 Pages) Linear Technology – Single-Phase, High Efficiency DC/DC Controller for Intel Mobile CPUs

LTC3734
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage (PV_CC, SV_CC).............. 7V to – 0.3V
Topside Driver Voltages (BOOST)............... 38V to –0.3V
Switch Voltage (SW)...................................... 32V to –5V
Boosted Driver Voltages (BOOST-SW).......... 7V to –0.3V
DPRSLPVR, STP_CPUB, MCH_PG, PGOOD,
RDPRSLP, RDPSLP, RBOOT Voltages .......... 5V to –0.3V
RUN/SS, FREQSET, PSIB Voltages ...............7V to – 0.3V
VID0-VID5 Voltages .....................................5V to – 0.3V
V_FB Voltage.................................................. 2V to –0.3V
V_OA+, V_OA– Voltage..................................... 3.6V to –0.3V
Peak Gate Drive Current <1µs (TG, BG).......................5A
Operating Ambient Temperature Range
(Note 2) ....................................................– 40°C to 85°C
Junction Temperature (Note 3).............................. 125°C
Storage Temperature Range.................... –65°C to 125°C
Reflow Peak Body Temperature............................. 245°C
PIN CONFIGURATION
V_OA+ 1
V_OA– 2
OAOUT 3
STP_CPUB 4
SGND 5
SENSE⁺ 6
SENSE ^– 7
32 31 30 29 28 27 26 25
24 TG
23 SW
22 PV_CC
21 BG
33
20 PGND
19 VID5
18 VID4
RDPRSLP 8
17 VID3
9 10 11 12 13 14 15 16
UH PACKAGE
32-LEAD (5mm × 5mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 34°C/W
EXPOSED PAD (PIN 33) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3734EUH#PBF
LTC3734EUH#TRPBF
3734
32-Lead Plastic (5mm × 5mm) QFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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/
TEMPERATURE RANGE
–40°C to 85°C
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_PVCC = V_SVCC = 5V, V_RUN/SS = 5V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
Main Control Loop
Reference
V_SENSEMAX
V_LOADREG
Regulated Feedback Voltage
Maximum Current Sense Threshold
Output Voltage Load Regulation
V_REFLNREG
V_PSIB
I_PSIB
V_OVL
g_m
g_mOL
V_ACTIVE
Reference Voltage Line Regulation
Forced Continuous Threshold
Forced Continuous Current
Output Overvoltage Threshold
Transconductance Amplifier g_m
Transconductance Amplifier Gain
Output Voltage in Active Mode
I_TH Voltage = 0.5V; Measured at V_FB (Note 4)
I_TH Voltage = Max; V_CM = 1.7V
l
(Note 4)
Measured in Servo Loop, ∆I_TH Voltage: 1.2V to 0.7V l
Measured in Servo Loop, ∆I_TH Voltage: 1.2V to 2V l
V_PVCC = V_SVCC = 4.5V to 7V
V_PSIB = 0V
Measured with Respect to V_FB = 0.6V
I_TH = 1.2V, Sink/Source 25µA (Note 4)
l
I_TH = 1.2V, (g_m • Z_L; No Ext Load) (Note 4)
VID = 010110, I_TH = 0.5V (0°C – 85°C)
VID = 010110, I_TH = 0.5V (Note 2)
l
59
0.57
0.64
4.5
1.342
1.336
0.600
72
0.1
–0.1
0.02
0.6
–0.5
0.66
6
3
1.356
1.356
V
85
mV
0.5
–0.5
0.1
0.63
–1
0.68
7.5
1.370
1.376
%
%
%/V
V
µA
V
mmho
V/mV
V
V
3734fa
2