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MAX1875EEG Datasheet(PDF) 9 Page - Maxim Integrated Products

Part # MAX1875EEG
Description  Dual 180째 Out-of-Phase PWM Step- Down Controllers with POR
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1875EEG Datasheet(HTML) 9 Page - Maxim Integrated Products

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The internal VL linear regulator can source over 50mA to
supply the IC, power the low-side gate driver, charge the
external boost capacitor, and supply small external
loads. When driving large FETs, little or no regulator cur-
rent may be available for external loads.
For example, when switched at 600kHz, a single large
FET with 18nC total gate charge requires 18nC 600kHz
= 11mA. To drive larger MOSFETs, or deliver larger
loads, connect VL to an external power supply from
4.75V to 5.5V.
Dual 180° Out-of-Phase PWM Step-
Down Controllers with POR
_______________________________________________________________________________________
9
CONVERTER #1
R
S
Q
ILIM1
DL1
PGND
LX1
DH1
BST1
VL - 0.5V
FB1
COMP1
SOFT-START
DAC
OSCILLATOR
OSC
SYNC
CK0
V+
5V LINEAR
REGULATOR
VL
GND
REF
DL2
LX2
DH2
BST2
ILIM2
FB2
COMP2
CONVERTER 2
RESET
EN
UVLO
AND
SHUTDOWN
VREF
2.0V
MAX1875
MAX1876
RST
(MAX1876 ONLY)
VREF
VL
Q
5
µA
Figure 2. Functional Diagram


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