PM6686 STMicroelectronics, PM6686 Datasheet - Page 12

• Manufacturer Part Number: PM6686
• Description: Dual Step-down Controller With Adjustable Voltages, Adjustable Ldo And Auxiliary Charge Pump Controller For Notebook
• Manufacturer: STMicroelectronics

Electrical characteristics
5
Table 6.
12/50
Switching controller output accuracy
Current limit and zero crossing comparator
Switching frequency
Soft-start and soft-end
Symbol
REFIN2
OUT2
OUT1
ILIM
FB1
Output voltage
Output voltage
Feedback accuracy with
OUT1 in adjustable mode
Accuracy referred to REFIN2
ILIM bias current
Positive current limit threshold
Zero crossing current
threshold
On-time pulse width
Minimum Off-time
No-audible skip mode
operating frequency
Soft-start ramp time
Electrical characteristics
VIN = 12 V, no load on LDO, OUT1, OUT2, VREF3, and VREF2. EN2 = EN1 = VCC,
LDO_SW = 5 V, PVCC = 5 V, EN_LDO = 5 V, T
Electrical characteristics
Parameter
VIN = 5.5 V to 28 V, REFIN2 = VCC,
SKIP = VCC
VIN = 5.5 V to 28 V,
REFIN2 = VREF3, SKIP = VCC
VIN = 5.5 V to 28 V, FB1 = VCC,
SKIP = VCC
VIN = 5.5 V to 28 V, FB1 = GND,
SKIP = VCC
VIN = 5.5 V to 28 V, SKIP = VCC
REFIN2 = 0.7 V to 2.5 V,
SKIP = VCC
T
Adjustable, VILIM = 0.5 V, GND-PHASE
Adjustable, VILIM = 1 V or VCC, GND-
PHASE
Adjustable, VILIM = 2 V, GND-PHASE
SKIP = GND, VREF2, or OPEN, GND-
PHASE
OUT1 = 5.125 V
OUT2 = 3.368 V
SKIP = VREF2(or OPEN)
A
Doc ID 15281 Rev 4
= +25 °C.
Test condition
J
= 25 °C unless otherwise specified)
TON = GND or
TON = VCC or
TON = VCC
TON = GND
VREF2
VREF2
1.038
1.482 1.500 1.518
4.975 5.050 5.125
0.693 0.700 0.707
0.908 1.068 1.228
1.815 2.135 2.455
0.477 0.561 0.655
0.796 0.936 1.076
3.25 3.330 3.397
Min
180
4.5
35
85
25
-1
-1
2
1.05
Typ
100
200
350
50
33
5
1.062
Max
115
220
+11
472
5.5
65
1
4
PM6686
Unit
kHz
mV
mV
mV
mV
ms
µA
µs
%
V
V
V
V
V