MFG:MAXIM Package Cooled:QSOP D/C:8
MFG: MAXIM
Package Cooled: QSOP
D/C: 8
Description: The MAX1714 pulse-width modulation (PWM) controller provides the high efficiency, excellent transient ...
The MAX1714 pulse-width modulation (PWM) controller provides the high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high-voltage batteries to generate lowvoltage CPU core or chip-set/RAM supplies in notebook computers.
Maxim's proprietary Quick-PWM™ quick-response,constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns "instant-on" response to load transients while maintaining a relatively constant switching frequency.
The MAX1714 achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Efficiency is further enhanced by an ability to drive very large synchronousrectifier MOSFETs.
Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. Alternatively, two-stage conversion (stepping down the +5V system supply instead of the battery) at a higher switching frequency allows the minimum possible physical size.
The MAX1714 is intended for CPU core, chipset,DRAM, or other low-voltage supplies as low as 1V. The MAX1714A is available in a 20-pin QSOP package and includes overvoltage protection. The MAX1714B is available in a 16-pin QSOP package with no overvoltage protection. For applications requiring VID compliance or DAC control of output voltage, refer to the MAX1710/MAX1711 data sheet. For a dual output version, refer to the MAX1715† data sheet.
V+ to AGND (Note 1).............................................-0.3V to +30V
VDD, VCC to AGND (Note 1)....................................-0.3V to +6V
PGND to AGND (Note 1) ....................................................±0.3V
SHDN, PGOOD, OUT to AGND (Note 1)....................-0.3V to +6V
ILIM, FB, REF,SKIP,
TON to AGND (Notes 1, 2).........................-0.3V to (VCC + 0.3V)
DL to PGND (Note 1).................................-0.3V to (VDD + 0.3V)
BST to AGND (Note 1) ..........................................-0.3V to +36V
DH to LX....................................................-0.3V to (BST + 0.3V)
LX to BST................................................................-6V to +0.3V
REF Short Circuit to AGND........................................Continuous
Continuous Power Dissipation (TA = +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C).............667mW
20-Pin QSOP (derate 9.1mW/°C above +70°C).............727mW
Operating Temperature Range ........................-40°C to +85°C
Junction Temperature....................................................+150°C
Storage Temperature Range ..........................-65°C to +150°C
Lead Temperature (soldering, 10s) ..............................+300°C
Note 1: For the MAX1714B, AGND and PGND refer to a single pin designated GND.
Note 2: SKIP may be forced below -0.3V, temporarily exceeding the absolute maximum rating, disabling over/undervoltage fault detection for the purpose of debugging prototypes (Figure 6). Limit the current drawn to 5mA maximum.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Ultra-High Efficiency
No Current-Sense Resistor (Lossless ILIMIT)
Quick-PWM with 100ns Load-Step Response
1% VOUT Accuracy Over Line and Load
2.5V/3.3V Fixed or 1V to 5.5V Adjustable Output Range
2V to 28V Battery Input Range
200/300/450/600kHz Switching Frequency
Overvoltage Protection (MAX1714A)
Undervoltage Protection
1.7ms Digital Soft-Start
Drives Large Synchronous-Rectifier FETs
2V ±1% Reference Output
Power-Good Indicator
Notebook Computers
CPU Core Supply
Chipset/RAM Supply as Low as 1V
1.8V and 2.5V I/O Supply
MAX1714AEEP
PDF/DataSheet Download
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