MAX15016AATX+ Maxim Integrated Products, MAX15016AATX+ Datasheet - Page 15

• Manufacturer Part Number: MAX15016AATX+
• Description: IC DC/DC CONV 1A 36-TQFN-EP
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX15016AATX+

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 1.26 ~ 32 V
• Current - Output: 1A
• Frequency - Switching: 135kHz ~ 500kHz
• Voltage - Input: 4.5 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 36-TQFN Exposed Pad
• Power - Output: 2.1W
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX15014–MAX15017 provide undervoltage lock-
out (UVLO). The UVLO monitors the input voltage
(V
or 7V (MAX15014/MAX15017).
REG is the output terminal of a 5V (MAX15015/
MAX15016), or 8V (MAX15014/MAX15017) LDO which
is powered from IN_SW and provides power to the IC.
Figure 2. MAX15014/MAX15017 Simplified Block Diagram
Table 1. Enable Inputs Configuration
EN_SW
COMP
SYNC
SGND
IN_LDO
REG
SS
FB
I
SS
) and is fixed at 4.1V (MAX15015/MAX15016)
1A, 4.5V to 40V Input Buck Converters with
EN_SYS
High
High
Low
Low
Internal Linear Regulator (REG)
REG_LDO
IN_SW
OSC
EN
VREG_OK
V
INT
REF
______________________________________________________________________________________
IN_LDO
IN S/W
RAMP
V
V
+
V
-
REF
REFOK
E/A
REF
-
-
+
+
-
V
VINT
0.3V
INT
THERMAL
7.0V OR 4.1V
V
SHDN
INT
UVLO_SW
V
V
CLK
+
REFOK
V
INTOK
V
REFOK
INTOK
4.1V
SHDN
CPWM
TSD
-
+
TSD
50mA Auxiliary LDO Regulators
EN_SW
High
High
Low
Low
UVLO_SW
SSA
UVLO_LDO
+
-
V
REG_EN
UVLO_LDO
V
VREG_ OK
REF
SHDN
V
INTOK
TSD
V
INT
EN_SYS
PREREG
SHDN
0.925 x V
EN
IN_LDO
REF
OVERL
ENABLE LDO
Connect REG externally to DVREG to provide power for
the high-side MOSFET gate driver. Bypass REG to
SGND with a ceramic capacitor (C
Place the capacitor physically close to the MAX15014–
MAX15017 to provide good bypassing. During normal
operation, REG is intended for powering up only the
internal circuitry and should not be used to supply
power to external loads.
-
+
MANAGEMENT
V
OVERLOAD
INT
PFM
LDO REGULATOR
ILIM
2µA
PASS ELEMENT
MAX15014/MAX15017
CLK
+
-
V
LOGIC
INT
Off
Off
On
On
PFM
DELAY COMPARATOR
V
REF_ILIM
REF
V
+
-
INT
SCLK
PCLK
+
-
+
-
OUT_LDO
V
REF
REF_PFM
DVREG
MUX
HIGH-SIDE
CURRENT
SENSE
V
DC-DC SWITCHING
INT
REG
CONVERTER
185mV
) of at least 1µF.
Off
Off
Off
On
LDO_OUT
SET_LOD
RESET
CT
DRAIN
BST
LX
PGND
15