LTC3882_15 Datasheet, PDF (104/104 Pages) Linear Technology – Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management

LTC3882
TYPICAL APPLICATION
10k
4.99k 10k
RUN
VDD25
10k
10k
16.2k
VIN
7V TO 14V
1Ω
330µF ⁺
×2
100nF
VDD33
VDD25
VCC
4.99k
2.2µF
4.99k
9
10
11
12
13
14
15
24
8
25 22
VDD33 VDD25
SCL
SDA
ALERT
GPIO0
GPIO1
RUN0
RUN1
SHARE_CLK
SYNC
1µF
4 26
VINSNS VCC
TG0/PWM0 ⁷
BG0/EN0 ⁶
ISENSE0+ ³⁸
ISENSE0–
VSENSE0+
VSENSE0–
FB0
37
36
35
40
17.4k
23 _WP
16 _ASEL0
17 _ASEL1
LTC3882
COMP0 ¹
TSNS0 ²
TSNS1 ³
4.7µF
INPUT SUPPLY +5V TO +12V
TG0_PWM0
100pF
137Ω
10nF
7.32k
220pF
PLACE Q1,Q2 NEAR L1, L2 RESPECTIVELY
10nF
Q1
10nF
Q2
18
19
20
VOUT0_CFG
VOUT1_CFG
FREQ_CFG
21 _{PHAS_CFG}
39
31
IAVG0
IAVG1
IAVG_GND
5
COMP1 ²⁹
FB1 ³⁰
VSENSE1+ ³⁴
ISENSE1–
ISENSE1+
TG1/PWM1
33
32
27
GND
BG1/EN1 ²⁸
41
220pF
7.32k
100pF
10nF
137Ω
TG1_PWM1
DrMOS: FAIRCHILD FD6802A
5VBIAS
1µF
2.2µF
10Ω
2k
VIN
1µF
22µF
×2 _{VIN PHASE GH CGND GND BOOT VDRV VCIN SMOD}
PWM
PGND
FDMF6820A
DISB
VSWH
CGND
GL
+5V INPUT SUPPLY
TG1_PWM0
RUN
L1
0.22µH
PULSE
1.21k
0.22µF
5VBIAS
1µF
2.2µF
10Ω
2k
VIN
1µF
22µF
×2 _{VIN PHASE GH CGND GND BOOT VDRV VCIN SMOD}
PWM
PGND
FDMF6820A
DISB
VSWH
CGND
GL
0.22µF
TG1_PWM1
RUN
1.21k
L2
0.22µH
PULSE
Figure 55. 1V/40A and 1.8V/30A 500kHz Converter with DrMOS Power Stage
100µF ⁺
×4
VOUT0
1.8V, 30A
470µF
×4
GND
100µF ⁺
×4
VOUT1
1V, 40A
470µF
×4
GND
3882 F55
RELATED PARTS
PART NUMBER
LTM4676
LTC3880/
LTC3880-1
LTC3883/
LTC3883-1
LTC2977
LTC2974
LTC3774
LTC3855
LTC3861
LTC4449
DESCRIPTION
Dual 13A or Single 26A Step-Down DC/DC Regulator with
Digital Power Management and Hi-Res Telemetry
Dual Output PolyPhase Step-Down DC/DC Controller with
Digital Power System Management
Single Phase Step-Down DC/DC Controller with Digital Power
System Management
8-Channel PMBus Power System Manager Featuring
Accurate Output Voltage Measurement
Quad Digital Power Supply Manager with EEPROM
Dual, Multiphase Current Mode Synchronous Controller for
Sub-Milliohm DCR Sensing with Remote Output Sense
Dual, Multiphase, Synchronous Step-Down DC/DC Controller
with Diffamp and DCR Temperature Compensation
Dual, Multiphase Step-Down Voltage Mode DC/DC Controller
with Accurate Current Sharing
High Speed Synchronous N-Channel MOSFET Driver
COMMENTS
VFa_INulUt pLotgog2in6g.5,VI₂; _{C0/.P5VMB≤uVsOIUnTt(e±r0fa.5ce%,} )16≤m5m.4V_×,
±2% I_OUT
16mm ×
ADC Accuracy,
5.01mm
BGA Package
V_IN Up to 24V, 0.5V ≤ V_OUT ≤ 5.5V, Analog Control Loop, I²C/PMBus
Interface with EEPROM and 16-Bit ADC
VI_{2ICN/PUMp Btous24InV,te0r.f5aVce≤wViOthUTEE≤P5R.5OVM,} Inapnudt1C6u-rBrietnAtDSCense Amplifier,
Fault Logging to Internal EEPROM, Monitors Eight Output Voltages and
Input Voltage and Die Temperature
Controls and Monitors Four Outputs, 16-Bit ADC, Differential Inputs,
EEPROM Fault Logging
Operates with Power Blocks, DrMOS Devices or External MOSFETs, 4.5V
≤ V_IN ≤ 38V
4.5V ≤ V_IN ≤ 38V, 0.8V ≤ V_OUT ≤ 12V, PLL Fixed Frequency 250kHz
to 770kHz
Operates with Power Blocks, DrMOS External MOSFETs, 3V ≤ V_IN ≤ 24V,
t_ON(MIN) = 20ns, Diffamp, Three-State Output Drive
V_IN Up to 38V, 4V ≤ V_CC ≤ 6.5V, Adaptive Shoot-Through Protection,
2mm × 3mm DFN-8 Package
104 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA_Fo9_r5_m0_o3_r5_e -_in7_f4_o1_rm7_{ation www.linear.com/LTC3882}
[phone] ^● FAX: [phone] ^● www.linear.com/LTC3882
3882f
LT 0814 • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2014