MAX15035ETL+ Maxim Integrated Products, MAX15035ETL+ Datasheet - Page 10

• Manufacturer Part Number: MAX15035ETL+
• Description: IC REG STEP DOWN 15A 40-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Step-Down (Buck)r

Specifications of MAX15035ETL+

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.05V, 1.5V
• Current - Output: 15A
• Voltage - Input: 4.5 ~ 26 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 40-TQFN Exposed Pad
• Power - Output: 2.16W
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

15A Step-Down Regulator with Internal Switches
10
(MAX15035 Circuit of Figure 1, V
1, 17, 27, 31,
39, 40
18–26
______________________________________________________________________________________
3, 28
5, 16
6–15
PIN
29
30
2
4
1.05V
1.05V
1.5V
1.5V
12V
-6A
0
0
DYNAMIC OUTPUT-VOLTAGE TRANSITION
A. REFIN, 500mV/div
B. V
I
OUT
OUT
NAME
AGND
PGND
= 2A
N.C.
TON
V
BST
EN
, 200mV/div
LX
IN
DD
(PWM MODE)
40μs/div
No Connection. Not internally connected.
Shutdown Control Input. Connect to V
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 V
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 (t
where C
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).
IN
C. INDUCTOR CURRENT,
D. LX, 10V/div
= 12V, V
10A/div
TON
DD
MAX15035 toc28
DD
to power ground with a 1μF or greater ceramic capacitor.
= 16.26pF and V
= 5V, SKIP = GND, R
Typical Operating Characteristics (continued)
A
B
C
D
SW
t
SW
FB
= 1/f
=
= V
C
TON
SW
REFIN
TON
DD
) according to the following equation:
(
R
for normal operation. Pull EN low to put the controller into its
TON
= 200kΩ, T
under normal operating conditions. If the TON current
FUNCTION
+
6 5 . Ω
k
1.05V
1.05V
1.5V
1.5V
10A
12V
A
)
0
0
⎛
⎜
⎝
= +25°C, unless otherwise noted.)
DYNAMIC OUTPUT-VOLTAGE TRANSITION
V
A. REFIN, 500mV/div
B. V
I
OUT
V
OUT
FB
OUT
= 2A
, 200mV/div
⎞
⎟
⎠
(SKIP MODE)
40μs/div
C. INDUCTOR CURRENT,
D. LX, 10V/div
Pin Description
10A/div
MAX15035 toc29
A
B
C
D