PM6686:Dual step-down controller with adjustable voltages, adjustable LDO and auxiliary charge pump controller for notebook

PM6686 is a dual step-down controller specifically designed to provide extremely high efficiency conversion, with lossless current sensing technique. The constant on-time architecture assures fast load transient response and the embedded voltage feed-forward provides nearly constant switching frequency operation. Pulse skipping technique increases efficiency at very light load. Moreover a minimum switching frequency of 33 kHz is selectable to avoid audio noise issues. The PM6686 provides a selectable switching frequency, allowing three different values of switching frequencies for the two switching sections. The output voltages OUT1 and OUT2 can be programmed to regulate 1.5 V/5 V and 1.05 V/3.3 V outputs respectively or can deliver two adjustable output voltages. An optional external charge pump can be monitored.

This device embeds a linear regulator that can provide 3.3 V/5 V or an adjustable voltage from 0.7 V to 4.5 V output. The linear regulator provides up to 100 mA output current. LDO can be bypassed with the switching regulator outputs or with an external power supply (switchover function).

When in switchover, the LDO output can source up to 200 mA.

Key Features

  • Latched OVP and UVP
  • Independent Power Good and EN signals
  • Fixed 3.3 V/5.0 V, or adjustable output 0.7 V to 4.5 V, ± 1.5% (LDO): 200 mA
  • Charge pump feedback
  • 2.0 V reference voltage ± 1.0%: 50 μA
  • 3.3 V reference voltage ± 2.0%: 5 mA
  • Selectable pulse skipping at light loads
  • Soft-start internally fixed at 2 ms and soft-stop
  • 5.5 V to 28 V input voltage range
  • Low-side MOSFETs' RDS(on) current sensing and programmable current limit
  • Dual fixed OUT1 = 1.5 V/5 V and OUT2 = 1.05 V / 3.3 V outputs or adjustable OUT1 = 0.7 V to 5.5 V and OUT2 = 0.7 V to 2.5 V outputs, ± 1.5% accuracy over valley regulation
  • Frequency selectable
  • Selectable minimum frequency (33 kHz) in pulse skip mode
  • Constant ON-time control
Product Specifications
DescriptionVersionSize
DS6017: Dual step-down controller with adjustable voltages, adjustable LDO and auxiliary charge pump controller for notebook4.21 MB
Application Notes
DescriptionVersionSize
AN2937: Power system demonstration kit based on the PM6686 dual step-down controller with adjustable voltages and adjustable LDO1.11 MB
AN2938: Power system demonstration kit based on the PM6686 dual step-down controller with adjustable voltages and adjustable LDO1.01 MB
Brochures
DescriptionVersionSize
Brochure Power management guide05.20164 MB
Sample & Buy
Part NumberPackagePacking TypeUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
PM6686VFQFPN 32 5x5x1.0Tray1.3211000NECEAR99-
PM6686TRVFQFPN 32 5x5x1.0Tape And Reel1.3211000NECEAR99-
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
PM6686VFQFPN 32 5x5x1.0IndustrialEcopack2md_42-wspc-vfqfpn-wspc-5x5x1.0-wspc-32l-wspc-pitch-wspc-0.5_b542uk01bb6-wspc-(pm6686)_a_ver2_signed.pdf
md_42-wspc-vfqfpn-wspc-5x5x1.0-wspc-32l-wspc-pitch-wspc-0.5_b542uk01bb6-wspc-(pm6686)_a_ver2.xml
PM6686TRVFQFPN 32 5x5x1.0IndustrialEcopack2md_42-wspc-vfqfpn-wspc-5x5x1.0-wspc-32l-wspc-pitch-wspc-0.5_b542uk01bb6-wspc-(pm6686)_a_ver2_signed.pdf
md_42-wspc-vfqfpn-wspc-5x5x1.0-wspc-32l-wspc-pitch-wspc-0.5_b542uk01bb6-wspc-(pm6686)_a_ver2.xml
Dual step-down controller with adjustable voltages, adjustable LDO and auxiliary charge pump controller for notebook PM6686
Power system demonstration kit based on the PM6686 dual step-down controller with adjustable voltages and adjustable LDO PM6686
Power system demonstration kit based on the PM6686 dual step-down controller with adjustable voltages and adjustable LDO PM6686
Very low drop voltage regulators with inhibit KFXX
md_42-wspc-vfqfpn-wspc-5x5x1.0-wspc-32l-wspc-pitch-wspc-0.5_b542uk01bb6-wspc-(pm6686)_a_ver2_signed.pdf PM6686
md_42-wspc-vfqfpn-wspc-5x5x1.0-wspc-32l-wspc-pitch-wspc-0.5_b542uk01bb6-wspc-(pm6686)_a_ver2.xml PM6686