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Part Number: MAX1636
Description: The MAX1636 is a synchronous, buck, switch-mode, power-supply controller that generates the CPU supply...
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MAX1636
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DataSheet
General Description
MAX1636 General Description
The MAX1636 is a synchronous, buck, switch-mode, power-supply controller that generates the CPU supply voltage in battery-powered systems. It achieves ±1% output voltage accuracy and offers the excellent loadtransient response needed by upcoming generations of dynamic-clock CPUs.
Up to 95% efficiency is achieved through synchronous rectification and Maxim's proprietary Idle Mode™ control scheme. Efficiency is greater than 80% over a 1000:1 load-current range, extending battery life in system-suspend or standby modes. Excellent dynamic response corrects output load transients caused by the latest dynamic-clock CPUs within five 300kHz clock cycles. Strong, 1A, on-board gate drivers ensure fast, external N-channel MOSFET switching.
The MAX1636 features a logic-controlled and synchronizable, fixed-frequency, pulse-width-modulation (PWM) operating mode that reduces noise and RF interference in sensitive mobile communications and pen-entry applications. Holding SKIP high forces fixed-frequency mode for lowest noise under all load conditions.
For a low-cost version that omits the +5V VL linearregulator block and comes in a smaller 16-pin QSOP package, refer to the MAX1637 data sheet.
MAX1636 Maximum Ratings
V+ to GND ..............................................................-0.3V to 36V
GND to PGND.........................................................................±2V
SHDN to GND. ......................................................... -0.3V to 36V
LX, BST to GND. ...................................................... -0.3V to 36V
DH, BST to LX.............................................................-0.3V to 6V
VL, VCC, CSL, CSH, FB, SKIP to GND ........................ -0.3V to 6V
DL to GND.. ..................................................-0.3V to (VL + 0.3V)
REF, RESET, SYNC, CC, OVP to GND. ......... -0.3V to (VCC + 0.3V)
VL Output Current... ..........................................................50mA
VL Short Circuit to GND..............................................Momentary
REF Output Current ...........................................................20mA
REF Short Circuit to GND ....... ......................................Indefinite
Continuous Power Dissipation (TA = +70°C)
SSOP (derate 8.00mW/°C above +70°C) .....................640mW
Operating Temperature Range
MAX1636EAP. ...................................................-40°C to +85°C
Storage Temperature Range ............................-65°C to +160°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10sec) .............................+300°C
GND to PGND.........................................................................±2V
SHDN to GND. ......................................................... -0.3V to 36V
LX, BST to GND. ...................................................... -0.3V to 36V
DH, BST to LX.............................................................-0.3V to 6V
VL, VCC, CSL, CSH, FB, SKIP to GND ........................ -0.3V to 6V
DL to GND.. ..................................................-0.3V to (VL + 0.3V)
REF, RESET, SYNC, CC, OVP to GND. ......... -0.3V to (VCC + 0.3V)
VL Output Current... ..........................................................50mA
VL Short Circuit to GND..............................................Momentary
REF Output Current ...........................................................20mA
REF Short Circuit to GND ....... ......................................Indefinite
Continuous Power Dissipation (TA = +70°C)
SSOP (derate 8.00mW/°C above +70°C) .....................640mW
Operating Temperature Range
MAX1636EAP. ...................................................-40°C to +85°C
Storage Temperature Range ............................-65°C to +160°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10sec) .............................+300°C
MAX1636 Features
±1% DC Accuracy (Adjustable Mode)
Output Overvoltage Crowbar Protection
Output Undervoltage Shutdown
Adjustable Switching Frequency to 340kHz
Low-Dropout Operation
Idle Mode Pulse-Skipping Operation
1.10V to 5.5V Adjustable Output Voltage
2.5V/3.3V Dual-Mode Fixed-Output Settings
Internal Digital Soft-Start
1.1V ±1% Reference Output
3µA (typ) Shutdown Current
Open-Drain Power-Good Output (REESET)
20-Pin SSOP Package
Output Overvoltage Crowbar Protection
Output Undervoltage Shutdown
Adjustable Switching Frequency to 340kHz
Low-Dropout Operation
Idle Mode Pulse-Skipping Operation
1.10V to 5.5V Adjustable Output Voltage
2.5V/3.3V Dual-Mode Fixed-Output Settings
Internal Digital Soft-Start
1.1V ±1% Reference Output
3µA (typ) Shutdown Current
Open-Drain Power-Good Output (REESET)
20-Pin SSOP Package
MAX1636 Typical Application
Notebook Computers
Subnotebook Computers
Desktop Computers
Bus-Termination Supplies
Subnotebook Computers
Desktop Computers
Bus-Termination Supplies
MAX1636 Connection Diagram
MAX1636
PDF/DataSheet Download
- Datasheet: MAX1636
- File Size: 222986 KB
- Manufacturer: MAXIM [Maxim Integrated Products]
- Click here to Download
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