LTC3883 Datasheet, PDF (112/112 Pages) Linear Technology – Single Phase Step-Down DC/DC Controller with Digital Power System Management

LTC3883/LTC3883-1
Typical Application
V_IN
6V TO 24V
High Efficiency 500kHz 1.8V Step-Down Converter with DCR Sense
5mΩ
10µF
INTV_CC
100Ω _1µF 100Ω
TG
LTC3883
I_{IN_SNS} BOOST
10nF
3Ω
10µF
PMBus
INTERFACE
V_DD33
10nF
10k
10k
10k
10k
10k
10k
10k
5k
V_{IN_SNS}
V_IN
SW
BG
PGND
PGOOD
SDA _{FREQ_CFG}
SCL
ALERT
RUN
V_{OUT_CFG}
V_{TRIM_CFG}
SHARE_CLK ASEL
GPIO
SYNC
WP
V_DD25
I_SENSE+
I_SENSE–
V_SENSE+
V_SENSE–
TSNS
1.0µF
V_DD33
I_TH
GND
1.0µF
22µF
1µF
D1
50V
M1
0.1µF
M2
V_DD25
20k
24.9k 10k
20k
12.7k 9.09k 23.2k 17.8k
100pF
2200pF MMBT3906
4.99k
0.56µH
1.4k
1µF
1.4k
0.22µF
V_OUT
1.8V
+ ^20A
C_OUT
530µF
3883 TA02
D1: CENTRAL CMDSH-3TR
M1: INFINEON BSC050N03LSG C_OUT: 330μH SANYO 4TPF330ML,
L: VISHAY IHLP-4040DZ-11 0.56µH M2: INFINEON BSC011N03LSI
2× 100µF AVX 12106D107KAT2A
Related Parts
PART NUMBER
DESCRIPTION
LTC3880/LTC3880-1 Dual Output Multiphase Step-Down Controller with
Digital Power System Management
COMMENTS
V_IN Up to 24V, 0.5V ≤ V_OUT ≤ 5.5V, Analog Control Loop, I²C/PMBus,
Interface with EEPROM and 16-Bit ADC
LTC3866
LTC3867
LTC3833
LTC3878/LTC3879
LTC3775
LTC3861
LTC2978
Sub Milli-Ohm Current Mode Synchronous Step-Down
Controller with Remote Sense
Synchronous Step-Down Controller with Differential
Remote Sense and Nonlinear Control
Fast Accurate Step-Down Controller with Differential
Output Sensing and up to 2MHz Frequency
No R_SENSE™ Constant On-Time Synchronous
Step-Down Controller
High Frequency Synchronous Voltage Mode
Step-Down Controller
Dual, Multiphase, Synchronous Step-Down Controller
with Diff Amp and Three-State Output Drive
Octal, PMBus Compliant Power Supply Monitor
Supervisor, Sequencer and Margin Controller
PLL Fixed Frequency 250kHz to 750kHz, 4V ≤ V_IN ≤ 38V,
0.6V ≤ V_OUT ≤ 5V, 4mm × 4mm QFN-24, TSSOP-24E
PLL Fixed Operating Frequency 250kHz to 750kHz, 4V ≤ V_IN ≤ 38V,
0.6V ≤ V_OUT ≤ 14V, 4mm × 4mm QFN-24
Very Fast Transient Response, t_ON(MIN) = 20ns, 4.5V ≤ V_IN ≤ 38V,
0.6V ≤ V_OUT ≤ 5.5V, TSSOP-20E, 3mm × 4mm QFN-20
Very Fast Transient Response, t_ON(MIN) = 43ns, 4V ≤ V_IN ≤ 38V,
0.8V ≤ V_OUT ≤ 0.9V_IN, SSOP-16, MSOP-16E, 3mm × 3mm QFN-16
Fast Transient Response, t_ON(MIN) = 30ns, 4V ≤ V_IN ≤ 38V,
0.6V ≤ V_OUT ≤ 0.8V_IN, MSOP-16E, 3mm × 3mm QFN-16
Operates with Power Blocks, DR MOS Devices or External MOSFETs,
3V ≤ V_IN ≤ 24V, Up to 2.25MHz Operating Frequency
Fault Logging to Internal EPROM, Monitors Eight Output Voltage Channels
and One Input Voltage
This product has a license from PowerOne, Inc. related to digital power technology as set forth in U.S. Patent 7000125 and other related patents owned by PowerOne, Inc.
This license does not extend to standalone power supply products.
3883f
112 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
LT 0812 • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2012