MC34716EP Freescale Semiconductor, MC34716EP Datasheet - Page 15

• Manufacturer Part Number: MC34716EP
• Description: IC CONVERTER DDR 26QFN
• Manufacturer: Freescale Semiconductor

Specifications of MC34716EP

• Applications: Converter, DDR
• Voltage - Input: 3 ~ 6 V
• Number Of Outputs: 2
• Voltage - Output: 0.7 ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 26-QFN
• Output Voltage: 0.7 V to 3.6 V
• Output Current: 5 A
• Input Voltage: 3 V to 6 V
• Switching Frequency: 1 MHz
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TRACKING AND SEQUENCING
track 1/2 the voltage applied at the VREFIN pin. This allows
the V
none of them will be higher than V
normal operating conditions. For power down during a
shutdown (S5) mode, the 34716 uses internal discharge
MOSFETs (M8, M9, and M10 on
discharge V
discharge MOSFETs are only active during shutdown mode.
Using this block along with controlling the SD and STBY pins
can offer the user the device for power sequencing by
controlling when to turn the 34716 outputs on or off.
BUCK CONVERTER
DC conversion from an un-regulated input voltage to a
regulated output voltage used by the loads for reliable
Analog Integrated Circuit Device Data
Freescale Semiconductor
This block allows the output of channel 2 of the 34716 to
This block provides the main function of the 34716: DC to
REF
and V
DDQ
TT
, V
voltages to track 1/2 V
TT
, and V
REF
respectively. These
Figure
DDQ
at any point during
DDQ
2, page 2) to
and assures that
operation. The buck converter is a high performance, fixed
frequency (externally adjustable),
voltage-mode control with a minimum on time of 100ns
It drives integrated 50 mΩ N-channel power MOSFETs
saving board space and enhancing efficiency. The switching
regulator output voltage is adjustable with an accuracy of less
than ±2% to meet DDR requirements. The regulator's voltage
control loop is compensated using a type III compensation
network, with external components to allow for optimizing the
loop compensation, for a wide range of operating conditions.
A typical Bootstrap circuit with an internal PMOS switch is
used to provide the voltage necessary to properly enhance
the high-side MOSFET gate.
supplies. The integrated converter has the ability to supply up
to 5.0 A out of channel 1 and sink and source up to 3.0 A of
continuous current from channel 2, providing a full power
supply solution for DDR applications.
The 34716 is designed to address DDR memory power
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
FUNCTIONAL DESCRIPTION
Syncronous buck PWM
34716
15
.