MAX17007EVKIT+ Maxim Integrated Products, MAX17007EVKIT+ Datasheet - Page 12

• Manufacturer Part Number: MAX17007EVKIT+
• Description: KIT EVAL FOR MAX17007
• Manufacturer: Maxim Integrated Products
• Series: Quick-PWM™r

Specifications of MAX17007EVKIT+

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 2, Non-Isolated
• Voltage - Output: 1.2V, 1.5V
• Current - Output: 12A, 12A
• Voltage - Input: 7 ~ 24V
• Regulator Topology: Buck
• Frequency - Switching: 270kHz, 330kHz
• Board Type: Fully Populated
• Utilized Ic / Part: MAX17007
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Dual and Combinable QPWM Graphics
Core Controllers for Notebook Computers
12
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PIN
10
11
12
13
5
6
7
8
9
PGOOD1
REFIN1
NAME
TON1
TON2
CSH1
CSL1
DH1
EN1
Pulse-Skipping Control Input. This four-level input determines the mode of operation under normal
steady-state conditions and dynamic output-voltage transitions:
There are no dynamic transitions for SMPS2, so
skipping behavior for SMPS2 without any forced-PWM transitions.
In combined mode, the ultrasonic mode is disabled, and the
to the
Frequency-Setting Input for SMPS1. An external resistor between the input power source and TON1
sets the switching period (T
where C
TON1 is high impedance in shutdown.
In combined mode, TON1 sets the switching period for both SMPS1 and SMPS2.
Frequency-Setting Input for SMPS2. An external resistor between the input power source and TON2
sets the switching period (T
where C
Set TON2 to a switching frequency different from TON1. A 10% to 30% difference in switching
frequency between SMPS1 and SMPS2 is recommended.
TON2 is high impedance in shutdown.
In combined mode, TON2 cannot be left open.
External Reference Input for SMPS1. REFIN1 sets the feedback regulation voltage of CSL1. SMPS1
includes an internal window comparator to detect REFIN1 voltage changes that are greater than
±50mV (typ), allowing the controller to blank PGOOD1 and the fault protection, and force the output
transition, if enabled. When REFIN1 is tied to V
In combined mode, REFIN1 sets the feedback regulation voltage of the combined output.
Output-Sense and Negative Current-Sense Input for SMPS1. When using the internal preset 1.05V
feedback divider (REFIN1 = V
the negative terminal of the current-sense element. Figure 14 describes two different current-sensing
options—using accurate sense resistors or lossless inductor DCR sensing.
Positive Current-Sense Input for SMPS1. Connect to the positive terminal of the current-sense
element. Figure 14 describes two different current-sensing options—using accurate sense resistors
or lossless inductor DCR sensing.
Enable Control Input for SMPS1. Connect to V
SMPS1. The controller slowly ramps down the output voltage to ground and after the target voltage
reaches 0.1V, the controller forces DL1 low. When both EN1 and EN2 are low, the device enters the
low-power shutdown state.
In combined mode, EN1 controls the combined SMPS output. EN2 is unused and must be grounded.
Open-Drain Power-Good Output for SMPS1. PGOOD1 is low when the SMPS1 voltage is more than 200mV
below or 300mV above the target voltage, during soft-start, and in shutdown. After the SMPS1 soft-start
circuit has terminated, PGOOD1 becomes high impedance 200µs after the output is in regulation. PGOOD1
is blanked (forced high-impedance state) when a dynamic REFIN1 transition is detected.
High-Side Gate-Driver Output for SMPS1. DH1 swings from LX1 to BST1. DH1 is low in shutdown.
V
Open (3.3V) = Ultrasonic mode (without forced-PWM during transitions)
REF (2V) = Pulse-skipping mode (with forced-PWM during transitions)
GND = Pulse-skipping mode (without forced-PWM during transitions)
T
T
SW1
SW2
DD
TON
TON
(5V) = Forced-PWM operation
= C
= C
= GND setting.
= 16.26pF.
= 16.26pF.
TON
TON
(R
(R
TON1
TON2
+ 6.5k )
+ 6.5k )
SW1
SW2
CC
) of SMPS1:
) of SMPS2:
), the controller uses CSL1 to sense the output voltage. Connect to
FUNCTION
CC
CC
, SMPS1 regulates the output to 1.05V.
for normal operation. Pull EN1 low to disable
Pin Description (continued)
= 2V and
= OPEN (3.3V) setting is identical
= GND have the same pulse-