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LTM4639 Arkusz danych(PDF) 1 Page - Linear Technology

Numer części LTM4639
Szczegółowy opis  Ultrathin, Triple Output, Step-Down 關Module Regulator for DDR-QDR4 Memory
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Producent  LINER [Linear Technology]
Strona internetowa  http://www.linear.com
Logo LINER - Linear Technology

LTM4639 Arkusz danych(HTML) 1 Page - Linear Technology

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LTM4632
1
4632fc
For more information www.linear.com/LTM4632
TYPICAL APPLICATION
FEATURES
DESCRIPTION
Ultrathin, Triple Output,
Step-Down µModule Regulator
for DDR-QDR4 Memory
The LTM®4632 is an ultrathin triple output step-down
µModule® (power module) regulator to provide complete
power solution for DDR-QDR4 SRAM. Operating from a
3.6V to 15V input voltage, the LTM4632 supports two ±3A
output rails, both sink and source capable, for VDDQ and
VTT, plus a 10mA low noise reference VTTR output. Both
VTT and VTTR track and are equal to VDDQ/2. Housed
in a 6.25mm × 6.25mm × 1.82mm LGA and 6.25mm ×
6.25mm × 2.42mm BGA packages, the LTM4632 includes
the switching controller, power FETs, inductors and sup-
port components. Alternatively, the power module can
also be configured as a two phase single ±6A output
VTT. Only a few ceramic input and output capacitors are
needed to complete the design.
The LTM4632 supports selectable Burst Mode operation
(CH1 only) and output voltage tracking for supply rail
sequencing. Its high switching frequency and current
mode control enable a very fast transient response to
line and load changes without sacrificing stability.
Fault protection features include overvoltage input, over-
current and overtemperature protection.
The LTM4632 is available with SnPb (BGA) or RoHS com-
pliant terminal finish
QDR4 Memory Power µModule Regulator
Output Efficiency vs Load Current
n
Complete DDR-QDR4 SRAM Power Solution
Including VDDQ, VTT, VTTR (or VREF)
n
Solution in 0.5cm2 (Dual-Sided PCB)
n
Wide Input Voltage Range: 3.6V to 15V
n
3.3V Input Compatible with VIN Tied to INTVCC
n
0.6V to 2.5V Output Voltage Range
n
Dual ±3A DC Output Current with Sink and Source
Capability
n
±1.5%, ±10mA Buffered VTTR = VDDQ/2 Output
n
3A VDDQ + 3A VTT or Dual Phase Single 6A VTT
n
±1.5% Maximum Total Output Voltage Regulation
Error Over Load, Line and Temperature
n
Current Mode Control, Fast Transient Response
n
External Frequency Synchronization
n
Multiphase Parallelable with Current Sharing
n
Selectable Burst Mode® Operation
n
Overvoltage Input and Overtemperature Protection
n
Power Good Indicator
n
Ultrathin 6.25mm × 6.25mm × 1.82mm LGA and
6.25mm × 6.25mm × 2.42mm BGA Packages
L
, LT, LTC, LTM, µModule, Burst Mode, Linear Technology and the Linear logo are registered
trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners.
52.3k
VDDQ
4632 TA01a
10µF
25V
VIN
3.6V TO 15V
VDDQ
1.3V, 3A
22µF
4V
22µF
4V
VOUT1
VTT
0.65V, ±3A
VTTR
0.65V, 10mA
VOUT2
COMP1
VTTR
FB1
GND
LTM4632
PGOOD1 PGOOD2
VIN
RUN1
RUN2
INTVCC
SYNC/MODE
TRACK/SS1
VDDQIN
COMP2
LOAD CURRENT (A)
0
65
90
80
75
70
85
95
2
3
1
4632 TA01b
12V INPUT
5V INPUT
APPLICATIONS
n
DDR Memory Power Supply
n
General Purpose Point-of-Load Conversion
n
Telecom, Networking and Industrial Equipment


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