MAX17007EVKIT+ Maxim Integrated Products, MAX17007EVKIT+ Datasheet - Page 18

• 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
The MAX17007/MAX17008 require an external 5V bias
supply in addition to the battery. Typically, this 5V bias
supply is the notebook’s 95%-efficient 5V system sup-
ply. Keeping the bias supply external to the IC improves
efficiency and eliminates the cost associated with the 5V
linear regulator that would otherwise be needed to sup-
ply the PWM circuit and gate drivers. If stand-alone
capability is needed, the 5V supply can be generated
with an external linear regulator such as the MAX1615.
The 5V bias supply powers both the PWM controllers
and internal gate-drive power, so the maximum current
drawn depends on the external MOSFET’s gate capaci-
tance, and the selected switching frequency:
Bypass V
the analog ground. Bypass V
ceramic capacitor to the power ground. V
should be separated with a 10Ω resistor (Figure 1).
Table 3. Pin Function in Combined and Separate Modes
18
ILIM2 (CCI)
I
______________________________________________________________________________________
BIAS
PGOOD1
PGOOD2
REFIN1
TON1
TON2
ILIM1
EN1
EN2
FB2
PIN
CC
= I
= 4mA to 40mA (typ)
Q
with a 1µF or greater ceramic capacitor to
+ f
SW1
Connect to V
combined-mode operation
Sets the combined output voltage—dynamic, fixed, and
preset voltages supported
Enables/disables combined output
Not used; connect to GND
Power-good indicator for combined output voltage
Not used; can be left open
Sets the per-phase switching frequency for both SMPSs
Use the same resistor as TON1
Sets the per-phase current limit for both SMPSs
Current-balance integrator output; connect a capacitor
from CCI to the output
Only three distinct modes of operation; ultrasonic mode
not supported
+5V Bias Supply (V
Q
G(SMPS1)
DD
CC
with a 2.2µF or greater
+ f
to configure MAX17007/MAX17008 for
COMBINED MODE
SW2
Q
G(SMPS2)
CC
CC
and V
, V
DD
DD
)
The 2V reference is accurate to ±1% over temperature
and load, making REF useful as a precision system ref-
erence. Bypass REF to GND with a 2.2nF. The refer-
ence sources up to 100µA and sinks 10µA to support
external loads.
Combined-mode operation allows the MAX17007/
MAX17008 to support even higher output currents by
sharing the load current between two phases, distribut-
ing the power dissipation over several power compo-
nents to improve the efficiency. The MAX17007/
MAX17008 are configured in combined mode by con-
necting FB2 to V
mode standard application circuit.
Table 3 lists the pin function differences between com-
bined mode and separate mode. See the Pin Description
table for additional details.
Combined-Mode Operation (FB2 = V
Connect to REF for preset 1.5V, or use a resistor-
divider to set the SMPS2 output voltage
Sets the SMPS1 output voltage—dynamic, fixed,
and preset voltages supported
Enables/disables SMPS1
Enables/disables SMPS2
Power-good indicator for SMPS1
Power-good indicator for SMPS2
Sets the switching frequency for SMPS1
Sets the switching frequency for SMPS2
Sets SMPS1 current limit
Sets SMPS2 current limit
Supports all four modes of operation
CC
. See Figure 2 for the combined-
SEPARATE MODE
2V Reference
CC
)