MAX8833 Maxim Integrated Products, MAX8833 Datasheet - Page 11

• Manufacturer Part Number: MAX8833
• Description: 2MHz Step-Down Regulator
• Manufacturer: Maxim Integrated Products

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For ratiometric tracking applications, connect REFIN to
the center of a voltage-divider from the output of regula-
tor 2 to GND (see Figure 3b). In this application, the EN_
inputs are connected to each other and driven as a sin-
gle enable input. Regulator 2 starts up with a normal soft-
start (C
ratiometrically tracks the regulator 2 output voltage. The
voltage-divider resistors set the V
Figure 3b. Startup and Sequencing Options—Ratiometric Tracking Startup and Shutdown Waveforms V
Figure 3c. Startup and Sequencing Options—Sequencing Startup and Shutdown Waveforms with External Reference
SS2
sets the time), and regulator 1 output
______________________________________________________________________________________
Dual, 3A, 2MHz Step-Down Regulator
OUT1
/V
OUT2
ratio (see
the Setting the Output Voltage section). In Figure 3b,
V
tance of 1000pF should be connected to SS1 for stability.
Figure 3c shows the output sequencing application
using an external reference.
Sequencing is achieved by connecting EN2 to
PWRGD1. In this mode, regulator 2 starts once regulator
1 reaches regulation.
OUT1
regulates to half of V
PWRGD2
PWRGD1
PWRGD2
PWRGD1
OUT1
OUT2
OUT2
OUT1
EN1
EN
10kΩ
10kΩ
10kΩ
10kΩ
OUT2
OUT2
OUT1
PWRGD1
PWRGD2
V
SS1
DD
PWRGD1
PWRGD2
V
SS1
DD
. Note that a capaci-
Track V
10kΩ
REFIN
EN2
SS2
EN1
REFIN
EN2
EN1
SS2
OUT2
10kΩ
EN
REFIN
EN1
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