MAX15035ETL データシートの表示（PDF） - Maxim Integrated
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MAX15035ETL Datasheet PDF : 28 Pages
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MAX15035
15A Step-Down Regulator with Internal Switches
Pin Configuration
TOP VIEW
30 29 28 27 26 25 24 23 22 21
N.C. 31
FB 32
EP1 EP3
IN
20 IN
19 IN
ILIM 33
REFIN 34
AGND
MAX15035
18 IN
17 N.C.
REF 35
EP2
SKIP 36
16 LX
15 PGND
VCC 37
PGOOD 38
14 PGND
LX
13 PGND
N.C. 39
12 PGND
N.C. 40
11 PGND
+ 1 2 3 4 5 6 7 8 9 10
Pin Description
PIN
1, 17, 27, 31,
39, 40
NAME
N.C.
2
EN
3, 28
4
5, 16
6–15
18–26
AGND
VDD
LX
PGND
IN
29
TON
30
BST
THIN QFN
(6mm x 6mm)
No Connection. Not internally connected.
FUNCTION
Shutdown Control Input. Connect to VDD for normal operation. Pull EN low to put the controller into
its 2µA (max) shutdown state. The MAX15035 slowly ramps down the target/output voltage to ground
and after the target voltage reaches 0.1V, the controller forces LX into a high-impedance state and
enters the low-power shutdown state. Toggle EN to clear the fault-protection latch.
Analog Ground. Internally connected to EP1.
Supply Voltage Input for the DL Gate Driver. Connect to the system supply voltage (+4.5V to +5.5V).
Bypass VDD to power ground with a 1µF or greater ceramic capacitor.
Inductor Connection. Internally connected to EP2. Connect LX to the switched side of the inductor as
shown in Figure 1.
Power Ground
Power MOSFET Input Power Source. Internally connected to EP3.
Switching Frequency-Setting Input. An external resistor between the input power source and TON
sets the switching period (tSW = 1/fSW) according to the following equation:
= t SW
C
TON(R
TON
+
6.5kΩ)
VFB
VOUT
where CTON = 16.26pF and VFB = VREFIN under normal operating conditions. If the TON current
drops below 10µA, the MAX15035 shuts down and enters a high-impedance state. TON is high
impedance in shutdown.
Boost Flying Capacitor Connection. Connect to an external 0.1µF capacitor as shown in Figure 1. The
MAX15035 contains an internal boost switch/diode (Figure 2).
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