MAX17014 Просмотр технического описания (PDF) - Maxim Integrated
Номер в каталоге
Компоненты Описание
производитель
MAX17014 Datasheet PDF : 33 Pages
| |||
Low-Cost Multiple-Output
Power Supply for LCD TVs
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VIN = VIN2 = 12V, AVDD = VOVIN = VSUP = 15V, TA = -40°C to +85°C. Typical values are at TA = +25°C, unless
otherwise noted.) (Note 4)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
MODE Voltage Threshold for Enabling
DRN Switch Control in Mode 2
GON connects to DRN, VMODE rising edge
1.2
1.4
V
MODE Current-Source Stop Voltage MODE rising edge
Threshold
2
3
V
THR-to-GON Voltage Gain
SEQUENCE CONTROL
EN1, EN2 Input Low Voltage
EN1, EN2 Input High Voltage
SWITCHING FREQUENCY SELECTION
FSEL Input Low Voltage
600kHz
FSEL Input High Voltage
1.2MHz
9.4
10.6
V/V
0.6
V
1.6
V
0.6
V
1.6
V
Note 2: When the inductor is in continuous conduction (EN2 = VL or heavy load), the output voltage has a DC regulation level lower than
the error comparator threshold by 50% of the output voltage ripple. In discontinuous conduction (EN2 = GND with light load), the
output voltage has a DC regulation level higher than the error comparator threshold by 50% of the output voltage ripple.
Note 3: Disables boost switching if either SUP, SWI, or OVIN exceeds the threshold. Switching resumes when no threshold is exceeded.
Note 4: Specifications to -40°C are guaranteed by design, not production tested.
Typical Operating Characteristics
(Circuit of Figure 1. VIN = VINL = VSUP = 12V, AVDD = 16V, VGON = 34.5V, VGOFF = -6V, VOUT1 = 3.3V, TA = +25°C, unless other-
wise noted.)
STEP-DOWN REGULATOR EFFICIENCY
vs. LOAD CURRENT
85
80 EN1 = VL, EN2 = GND
75
70
65
60
EN1 = VL, EN2 = VL
55
STEP-DOWN REGULATOR
OUTPUT VOLTAGE vs. LOAD CURRENT
3.350
EN1 = VL, EN2 = GND
3.325
3.300
3.275
3.250
3.225
EN1 = VL, EN2 = VL
STEP-DOWN REGULATOR
LOAD TRANSIENT RESPONSE
MAX17014 toc03
A
3.3V
2A
B
0.1A
C
50
3.200
0A
0.01
0.1
1
10
0 0.40 0.80 1.20 1.60 2.00 2.40
10μs/div
LOAD CURRENT (A)
LOAD CURRENT (A)
A: VOUT, 100mV/div
B: LOAD CURRENT, 2A/div
C: INDUCTOR CURRENT, 1A/div
_______________________________________________________________________________________ 9
Share Link: 