PM6686TR STMicroelectronics, PM6686TR Datasheet - Page 37
PM6686TR
Manufacturer Part Number
PM6686TR
Description
IC CTLR DUAL STEP DOWN VFQFPN32
Manufacturer
STMicroelectronics
Datasheet
1.PM6686TR.pdf
(50 pages)
Specifications of PM6686TR
Applications
Controller, Notebook Computers
Voltage - Input
5.5 ~ 28 V
Number Of Outputs
2
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
32-VFQFN, 32-VFQFPN
Output Voltage
5.5 V
Output Current
100 mA
Output Power
4.3 mW
Input Voltage
5.5 V to 28 V
Switching Frequency
33 KHz
Mounting Style
SMD/SMT
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
497-8522-2
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PM6686TR
Manufacturer:
st
Quantity:
2 069
Part Number:
PM6686TR
Manufacturer:
ST
Quantity:
20 000
PM6686
9.6
9.7
9.7.1
The minimum voltage of the charge pump is:
Equation 7
Where V
In case the charge pump feedback is not used, leave the CP_FB pin floating or connect the
pin to VCC.
Voltage references
The PM6686 provides two voltage references.
The device regulates a 3,3 V voltage reference (VREF3) with ±2% accuracy over
temperature. VREF3 can source up to 5 mA. VREF3 voltage is always available if V
applied. The device allows the enabling of the outputs if VREF3 is above 2,8V typ. and turns
off when VREF3 falls under 2,7 V typ.
VREF2 is a + 2 V reference with an accuracy of ±1% over temperature. It can source up to
50 µA typ. and sink up to 10 µA. VREF2is adopted as internal reference; this voltage can be
used as voltage threshold to set configuration pins (e.g. TON, SKIP pins). VREF2 is enabled
when one enable pin (EN1, EN2 or EN_LDO) is pulled high.
General device fault management
Thermal protection
If the internal temperature of the device exceeds typically +150 °C, the controller shuts down
immediately all the internal circuitry. Switching sections performs the soft-end management.
Toggling EN, EN LDO or cycling VIN resets the latched fault.
CP_FB
is the minimum voltage of CP_FB pin(2V typ.).
Doc ID 15281 Rev 4
V
CP
_
MIN
=
V
CP
_
FB
⋅
⎛
⎜ ⎜
⎝
1
+
R
R
2
1
⎞
⎟ ⎟
⎠
Monitoring and protections
IN
is
37/50