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MAX15014 bảng dữ liệu(PDF) 15 Page - Maxim Integrated Products

tên linh kiện MAX15014
Giải thích chi tiết về linh kiện  1A, 4.5V to 40V Input Buck Converters with 50mA Auxiliary LDO Regulators
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nhà sản xuất  MAXIM [Maxim Integrated Products]
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MAX15014 bảng dữ liệu(HTML) 15 Page - Maxim Integrated Products

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active. When EN_SYS is low, the entire chip is off (see
Table 1).
The MAX15014–MAX15017 provide undervoltage lockout
(UVLO). The UVLO monitors the input voltage (VIN_LDO)
and is fixed at 4.1V (MAX15015/MAX15016) or 7V
(MAX15014/MAX15017).
Internal Linear Regulator (REG)
REG is the output terminal of a 5V (MAX15015/
MAX15016), or 8V (MAX15014/MAX15017) LDO that
is powered from IN_SW and provides power to the IC.
Connect REG externally to DVREG to provide power for
the high-side MOSFET gate driver. Bypass REG to SGND
with a ceramic capacitor (CREG) of at least 1μF. Place the
Figure 2. MAX15014/MAX15017 Simplified Block Diagram
Table 1. Enable Inputs Configuration
EN_SYS
EN_SW
LDO REGULATOR
DC-DC SWITCHING
CONVERTER
Low
Low
Off
Off
Low
High
Off
Off
High
Low
On
Off
High
High
On
On
MAX15014
MAX15017
PASS ELEMENT
DELAY COMPARATOR
VREF
REF_ILIM
VREF
TSD
VREF
ISS
PREREG
SHDN
REG_LDO
HIGH-SIDE
CURRENT
SENSE
DVREG
LOGIC
OVERLOAD
MANAGEMENT
THERMAL
SHDN
MUX
VINT
RAMP
IN S/W
+
-
+
-
+
-
REF_PFM
CLK
OVERL
+
-
LDO_OUT
SET_LOD
CT
DRAIN
BST
LX
RESET
185mV
PGND
VINT
VREF
VINTOK
VREG_EN
UVLO_LDO
UVLO_SW
ENABLE LDO
0.925 x VREF
VREG_ OK
PFM
EN
PFM
VREG_OK
VINT
VINT
VINT
VINT
-
+
VINT
IN_LDO
VINT
-
+
UVLO_LDO
TSD
SHDN
UVLO_SW
TSD
SHDN
VREF
2A
OUT_LDO
-
+
EN_SYS
IN_SW
IN_LDO
PCLK
SCLK
SSA
+
-
E/A
+
-
-
+
+
0.3V
CLK
-
CPWM
EN
OSC
VREFOK
4.1V
VINTOK
VREFOK
7.0V OR 4.1V
VINTOK
REF
VINT
VREFOK
REG
EN_SW
SS
FB
COMP
SYNC
SGND
ILIM
MAX15014–MAX15017
1A, 4.5V to 40V Input Buck Converters with
50mA Auxiliary LDO Regulators
www.maximintegrated.com
Maxim Integrated │ 15



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