MAX1956ETI Maxim Integrated Products, MAX1956ETI Datasheet - Page 8

• Manufacturer Part Number: MAX1956ETI
• Description: DC/DC Switching Controllers
• Manufacturer: Maxim Integrated Products

Specifications of MAX1956ETI

• Number Of Outputs: 2
• Output Voltage: 0.8 V to 4.95 V
• Input Voltage: 1.6 V to 5.5 V
• Package / Case: TQFN EP-28
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

V
V
V
V
1.6V to 5.5V Input, 0.5% Accurate, Dual
180° Out-of-Phase Step-Down Controllers
8
(Circuit of Figure 5, T
V
OUT2
CTL2
OUT1
CTL1
OUT
I
L
PIN
_______________________________________________________________________________________
1
2
3
4
5
NO LOAD TO SHORT CIRCUIT
LOW-OUTPUT MARGINING
NAME
SYNC
BST1
DH1
DL1
LX1
100µs/div
40µs/div
A
Low-Side MOSFET Gate-Driver Output. Connect to the low-side MOSFET gate. DL1 is pulled low in shutdown.
Inductor Connection. Connect to the switched side of the inductor.
High-Side MOSFET Gate-Driver Output. Connect to the high-side MOSFET gate. DH1 is pulled low in
shutdown.
High-Side MOSFET Gate-Driver Bootstrap Connection. Connect a capacitor from BST1 to LX1 and a Schottky
diode from V
Frequency Synchronization Input. Connect to GND for normal 600kHz operation, or drive with a clock signal
from 1080kHz to 1320kHz. The two step-down regulators are synchronized to alternating clock pulses,
resulting in 180° out-of-phase operation at half the synchronization frequency.
= +25°C, unless otherwise noted.)
MAX1955/56 toc22
MAX1955/56 toc19
DD
100mV/div
5V/div
1V/div
10A/div
5V/div
100mV/div
to BST1.
V
V
V
V
V
OUT2
CTL2
OUT1
CTL1
OUT
Typical Operating Characteristics (continued)
I
L
SHUTDOWN/STARTUP WITH SEQ = GND
20A LOAD TO SHORT CIRCUIT
40µs/div
4ms/div
FUNCTION
MAX1955/56 toc20
MAX1955/56 toc23
1V/div
5V/div
5V/div
1V/div
1V/div
10A/div
0A
V
V
V
V
V
V
V
V
OUT2
OUT2
CTL2
OUT1
CTL2
OUT1
CTL1
CTL1
SHUTDOWN/STARTUP WITH SEQ = AV
HIGH OUTPUT MARGINING
Pin Description
100µs/div
4ms/div
MAX1955/56 toc24
MAX1955/56 toc21
DD
1V/div
100mV/div
5V/div
5V/div
5V/div
1V/div
5V/div
100mV/div