LTC7050
Dual SilentMOS Smart Power
Stage in 5mm × 8mm LQFN
FEATURES
DESCRIPTION
The LTC®7050 dual monolithic power stage fully inte-
grates high speed drivers with low resistance half-bridge
power switches plus comprehensive monitoring and
protection circuitry in an electrically and thermally opti-
mized package. With a suitable high frequency control-
ler, this power stage forms a compact, high current volt-
age regulator system with state-of-the-art efficiency and
transient response.
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70A Peak Output Current per Channel
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SilentMOS™ Smart Power Stage
Utilizes Low EMI/EMC Silent Switcher®2
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Architecture
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Ultra-low SW-Voltage Overshoot
Frequency Up to 2MHz
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V Up to 14V
IN
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Up to 94% Efficiency at 1MHz with 1.8V
Integrated Boost Diodes and Capacitors
Accurate Switch Current Monitoring
Power MOSFET Overcurrent Protection
Input Overvoltage and Bias Undervoltage Protection
Thermal Monitor with Overtemperature Flag
3.3V/5V Compatible Tri-State PWM Input
5mm × 8mm LQFN Package
OUT
SilentMOS technology utilizes second generation Silent
Switcher 2 architecture reducing both EMI and switch-
node voltage overshoot while maximizing efficiency at
high switching frequencies.
High speed current sensing provides low latency switch
current information, enabling tight current balancing and
immediate overcurrent protection.
APPLICATIONS
Thermally-enhanced packaging provides dual 40A rated
continuous output current capability.
All registered trademarks and trademarks are the property of their respective owners. Protected
by U.S. patents, including 9525351.
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High Current Servers and Workstations
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Networking/Telecom Microprocessor Supplies
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Small Form-Factor POL Converter
TYPICAL APPLICATION
Efficiency vs IOUT at 1MHz
95
90
85
80
75
70
65
12
10
8
12VIN, 1V/70AOUT 1MHz Dual-Phase POL Converter
EFFICIENCY
V
IN
4.5V TO 14V
10Ω
10µF
V
6
CC
PV
CC
5V
8k
V
V
INSNS
CC
POWER LOSS
V
V
PV
PV
47pF
1µF
FREQ
FB2
CC
CC
CC
CC
4
2.61k
50k
10k
LTC3861
I
10µF
×10
LIM2
2
33.2Ω
V
IN
INDUCTOR LOSS INCLUDED
L = L = VLBU9664100LT-R18L
1 2
I
SNS1N
V
SNSOUT1
SNSP1
LTC7050
8k
0
I
I
SNS1
SNS1P
RUN1
0
10
20
30
40
50
60
70
V
OUT
V
RUN1,2
PWM1
PWM2
FLTB1,2
LOAD CURRENT (A)
180nH
12k
7050 TA01b
PWM1
PWM2
RUN2
SW1
SW2
V
V
OUT
SNSN1
3.3nF
280Ω
10k
1V
180nH
VSW Waveform at 1MHz
70A
330µF
×3
FB1
100pF
5.9k
I
I
SNS2P
SNS2
12.5V
COMP1, 2
33.2Ω
100µF
×2
I
SNS2N
4.7nF
SGND PGND
7050 TA01a
I
LIM1
V
59k
SW1
I
AVG
SGND
1k
0.1µF
2V/DIV
SS1, 2
PINS NOT SHOWN IN LTC3861 CIRCUIT:
CLKIN, CONFIG, VSNSN2, VSNSOUT2,
VSNSP2, CLKOUT, PHSMD, PGOOD1,
PGOOD2, PWMEN1, PWMEN2
100pF
PINS NOT SHOWN IN LTC7050 CIRCUIT:
TDIO, TMON/FLT
0.1µF
V
OUT
= 12V
IN
I
= 60A
7050 TA01c
5ns/DIV
Rev. 0
1
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