MAX1515ETG+ Maxim Integrated Products, MAX1515ETG+ Datasheet - Page 12

• Manufacturer Part Number: MAX1515ETG+
• Description: IC REG DDR LV 24-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX1515ETG+

• Applications: Converter, DDR
• Voltage - Input: 1.3 ~ 3.6 V
• Number Of Outputs: 2
• Voltage - Output: 0.5 ~ 2.7 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 1. Component Selection for Standard Applications
Table 2. Component Suppliers
Low-Voltage, Internal Switch,
Step-Down/DDR Regulator
12
Coilcraft
Coiltronics
Kemet
Panasonic
Sanyo
Sumida
Taiyo Yuden
TDK
TOKO
Switching Frequency (f
C
Output Voltage (V
OUT
21, 22
23, 24
C
Input Voltage (V
______________________________________________________________________________________
PIN
IN
18
19
20
COMPONENT
, Input Capacitor
, Output Capacitor
L, Inductor
SUPPLIER
R
TOFF
FBSEL1
NAME
SKIP
BST
IN
OUT
LX
IN
)
SW
)
)
Used with FBSEL0 to set the output voltage of the step-down regulator when MODE = GND.
Connect to GND if MODE = V
Pulse-Skipping Control Input. Connect to V
enable automatic pulse-skipping operation.
Boost Flying-Capacitor Connection. Connect an external 0.01µF capacitor as shown in the standard
application circuit (Figure 1).
Inductor Switched Node. LX is the connection for the source of the high-side NMOS power switch
and drain of the low-side NMOS synchronous-rectifier switch. Connect both LX pins together.
Power Input. Supply voltage input for the switching regulator. Connect to a +1.3V to +3.6V supply
voltage. Connect both IN pins together.
Sanyo 2R5TPE330MI
2.5µH, 4.5A, Sumida
www.coilcraft.com
www.coiltronics.com
www.kemet.com
www.panasonic.com
www.sanyo.com
www.sumida.com
www.t-yuden.com
www.component.tdk.com
www.tokoam.com
CDRH8D28-2R5
330µF, 18mΩ
221kΩ, 1%
POSCAP
250kHz
DDR MODE (MODE = V
WEBSITE
TDK C3225XR0J336V
33µF, 6.3V, ceramic
±2A AT 1.25V
2.3V to 2.7V
1.25V
Sanyo 2R5TPE220MI
1.2µH, 6.8A, Sumida
CDR7D28MN-1R2
CC
OUT
220µF, 18mΩ
110kΩ, 1%
.
POSCAP
500kHz
CC
)
The MAX1515 standard application circuit (Figure 1)
generates a tracking output voltage and a reference
buffer output required for DDR termination regulators.
See Table 1 for component selections. Table 2 lists the
component manufacturers.
The MAX1515 synchronous, current-mode, constant
off-time, PWM DC-DC converter steps down an input
voltage (V
from +0.5V to +2.7V. The MAX1515 output delivers up
to 3A of continuous current. Internal 40mΩ NMOS
power switches improve efficiency, reduce component
count, and eliminate the need for a boost diode or any
external Schottky diodes (Figure 2).
CC
FUNCTION
for low-noise, forced-PWM mode. Connect to GND to
Standard Application Circuit
IN
Pin Description (continued)
) from +1.3V to +3.6V to an output voltage
Sanyo 2R5TPE330MI
2.5µH, 4.5A, Sumida
CDRH8D28-2R5
330µF, 18mΩ
221kΩ, 1%
POSCAP
250kHz
DDR MODE (MODE = V
Detailed Description
TDK C3225XR0J336V
33µF, 6.3V, ceramic
±2A AT 0.9V
1.6V to 2.0V
0.9V
Sanyo 2R5TPE220MI
1.2µH, 6.8A, Sumida
CDR7D28MN-1R2
OUT
220µF, 18mΩ
110kΩ, 1%
POSCAP
500kHz
CC
)