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LTM4632EV Scheda tecnica(PDF) 2 Page - Linear Technology

Il numero della parte LTM4632EV
Spiegazioni elettronici  Ultrathin 關Module Regulator for DDR-QDR4 Memory VDDQ, VTT and VREF
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Produttore elettronici  LINER [Linear Technology]
Homepage  http://www.linear.com
Logo LINER - Linear Technology

LTM4632EV Scheda tecnica(HTML) 2 Page - Linear Technology

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dc2367af
DEMO MANUAL DC2367A
QUICK START PROCEDURE
Demonstration circuit DC2367A is an easy way to evaluate
the performance of the LTM4632. Please refer to Figure 1
for test setup connections and follow the procedure below.
1. With power off, place the jumpers in the following
positions for a typical application for 2.5VOUT1 and
1.25VOUT2 rails:
JP1
JP2
JP3
JP4
JP6
RUN1
RUN2
TRACK/SS
MODE
VDDQ SEL
ON
ON
SS
CCM
2.5V
2. Before powering up the input supply and loads, preset
the input voltage supply to be between 3.6V to 15V.
Preset the load current for each output rail to 0A.
3. With power off, connect the loads, input voltage supply
and meters as shown in Figure 1.
4. Turn on the input power supply. The output voltage me-
tersforeachoutputrailshoulddisplaytheprogrammed
output voltage ±1.5%.
5. Once the proper output voltages are established, ad-
just the load current on each rail within the 0A to 3A
range and observe each output rail’s load regulation,
efficiency, and other parameters.
6. To observe increased light load efficiency place the
mode pin jumper (JP4) in the BURST MODE position.
PERFORMANCE SUMMARY Specifications are at T
A = 25°C
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input Voltage Range
3.6
15
V
Output Voltage VOUT1 (VDDQ)
Resistor Programmable, Jumper Selectable
1.5 (±1.5%)
1.8 (±1.5%)
2.5 (±1.5%)
V
V
V
Maximum Continuous Output Current IOUT1 Derating Is Necessary for Certain Operating
Conditions. See Data Sheet for Details
3
A
Output Voltage VOUT2 (VTT)
VOUT1 = 1.5V
VOUT1 = 1.8V
VOUT1 = 2.5V
0.75
0.9
1.25
V
V
V
Maximum Continuous Output Current IOUT2 Derating Is Necessary for Certain Operating
Conditions. See Data Sheet for Details
±3
A
Default Operating Frequency
1
MHz
Efficiency
VIN = 12V, VOUT1 = 2.5V, IOUT = 3A, fSW = 1MHz
VIN = 12V, VOUT2 = 1.25V, IOUT = 3A, fSW = 1MHz
83.9
(See Figure 2)
72.3
(See Figure 3)
%
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