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MAX1994

Features: Dual Quick-PWM Architecture±1% VOUT Accuracy5-Bit On-Board D/A Converter+0.60V to +1.75V Output Adjust Range (MAX1816)+0.70V to +2.00V Output Adjust Range (MAX1994)Voltage-Positioning Gain and Offset Control+2V to +28V Battery Input RangeDifferential Remote Sense (BUCK1)Linear-Regulator ...

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SeekIC No. : 004409507 Detail

MAX1994: Features: Dual Quick-PWM Architecture±1% VOUT Accuracy5-Bit On-Board D/A Converter+0.60V to +1.75V Output Adjust Range (MAX1816)+0.70V to +2.00V Output Adjust Range (MAX1994)Voltage-Positioning Gain...

MAX1994 Data Sheet

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Part Number:
MAX1994
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/27

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Product Details

Description



Features:

 Dual Quick-PWM Architecture
 ±1% VOUT Accuracy
 5-Bit On-Board D/A Converter
 +0.60V to +1.75V Output Adjust Range (MAX1816)
 +0.70V to +2.00V Output Adjust Range (MAX1994)
 Voltage-Positioning Gain and Offset Control
 +2V to +28V Battery Input Range
 Differential Remote Sense (BUCK1)
 Linear-Regulator Controller
 200/300/550/1000kHz Switching Frequency
 2.2mA (typ) ICC Supply Current
 20µA (max) Shutdown Supply Current
 Independent Power-Good Outputs (PGOOD, LINGOOD)


Application

Mobile CPU Core and Video Processors
Memory I/O and VID Supplies
3- to 4-Cell Li+ Battery to CPU Core Supply
Small Notebook Computers


Pinout

Connection Diagram


Specifications

V+ to AGND............................................................-0.3V to +30V
VCC, VDD to AGND....................................................-0.3V to +6V
PGND, GDS to AGND ..........................................................±0.3V
SKP1/SDN, SKP2/SDN, LIN/SDN to AGND...............-0.3V to +16V
LINBSE, SUS, PERF, DPSLP, PGOOD,
    LINGOOD, CS1+, CS1-, FBS, D0D4,
    OUT2 to AGND.....................................................-0.3V to +6V
OFS0, OFS1, OFS2, ILIM1, ILIM2,
    FB2, REF, TON, TIME, OVPSET, S0, S1,
    GAIN, CC, LINFB to AGND ......................-0.3V to (VCC + 0.3V)
DL1, DL2 to PGND ......................................-0.3V to (VDD + 0.3V)
DH1 to LX1 ..............................................-0.3V to (VBST1 + 0.3V)
DH2 to LX2 ..............................................-0.3V to (VBST2 + 0.3V)
BST1 to LX1..............................................................-0.3V to +6V
BST2 to LX2..............................................................-0.3V to +6V
LX1, LX2, CS2 to AGND .............................................-2V to +30V
REF Short Circuit to AGND...........................................Continuous
LINBSE Short Circuit to +6V.......................................Continuous
Continuous Power Dissipation (TA = +70°C)
    48-Pin Thin QFN (derate 26.3mW/°C above +70°C) .2105mW
Operating Temperature Range .........................-40°C to +100°C
Junction Temperature.......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C


Description

The MAX1816/MAX1994 are dual step-down controllers for notebook computer applications. BUCK1 is a CPU core regulator with dynamically adjustable output, ultrafast transient response, high DC accuracy, and high efficiency. BUCK2 is an adjustable step-down regulator for I/O and memory supplies. Both regulators employ Maxim's proprietary Quick-PWM™ control architecture. This fastresponse, 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 MAX1816/MAX1994 also have a linear-regulator controller for low-voltage auxiliary power supplies.

The CPU regulator supports "active voltage positioning" to reduce output bulk capacitance and lower power dissipation. A programmable gain amplifier allows the use of lower value sense resistors. Four fixed-gain settings are available (0, 1.5, 2, and 4). A differential remotesense amplifier is also included to more accurately control the voltage at the load. Accuracy is further enhanced with an internal integrator.

The MAX1816/MAX1994 include a specialized digital interface that makes them suitable for mobile CPU and video processor applications. The power-good (PGOOD) output for the core regulator is forced high during VID transitions, and the LINGOOD output for the linear regulator includes a 1ms (min) turn-on delay.

BUCK1, BUCK2, and the linear regulator feature overvoltage protection (OVP). The detection threshold for BUCK1 is adjusted with an external resistive voltage-divider, while the OVP thresholds for BUCK2 and the linear regulator are fixed. Connecting the OVPSET pin to VCC disables OVP for BUCK1 and BUCK2, but not the linear regulator.

The MAX1816 features an output-voltage adjustment range from 0.6V to 1.75V. Similarly, the MAX1994 is adjustable from 0.925V to 2.0V, using an alternate VID code set. While in suspend mode, the adjustment range is 0.7V to 1.075V for both the MAX1816 and MAX1994. Both parts are available in 48-pin thin QFN packages.




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