參數(shù)資料
型號： DS21Q48N
廠商： DALLAS SEMICONDUCTOR
元件分類： Digital Transmission Interface
英文描述： DATACOM, PCM TRANSCEIVER, PBGA144
封裝： BGA-144
文件頁數(shù)： 10/16頁
文件大?。?/td> 296K
代理商： DS21Q48N
MAX863
Dual, High-Efficiency, PFM, Step-Up
DC-DC Controller
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS
(VDD = +5V, ILOAD = 0mA, TA = -40°C to +85°C, unless otherwise noted.) (Note 6)
Note 1: When bootstrapped, an internal low-voltage oscillator drives the EXT1 pin rail-to-rail for low supply voltages.
Note 2: For non-bootstrapped operation, VDD > 2.7V is required to allow valid operation of all internal circuitry.
Note 3: For adjustable output voltages, see the Set the Output Voltage section.
Note 4: Measured with LBI falling. Typical hysteresis is 15mV.
Note 5: EXT1 and EXT2 swing from VDD to GND.
Note 6: Specifications to -40°C are guaranteed by design and not production tested.
VDD = OUT1 (Note 1)
1.6
11
CONDITIONS
VDD Input Voltage
(Note 2)
V
2.8
11
VDD
V
1.21
1.285
VFB
FB1, FB2 Threshold Voltage
60
mV
85
115
VCS
CS1, CS2 Threshold Voltage
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
FB1 = VDD
3.15
3.45
OUT1 Output Voltage
(Note 3)
FB1 = GND
V
4.8
5.2
VOUT1
SHDN1 = SHDN2 = VDD, measured from VDD
85
Quiescent Current
SHDN1 = VDD, SHDN2 = GND,
measured from VDD
A
IDD
SHDN1 = SHDN2 = GND
A
1
IDD, SHDN
Shutdown Current
__________________________________________Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
0.01
0.1
1
10
100
1000
EFFICIENCY vs. OUTPUT CURRENT
(VOUT1 = 3.3V, BOOTSTRAPPED)
MAX863
toc01
OUTPUT CURRENT (mA)
EFFICIENCY
(%)
B
C
A
10
0
30
20
50
40
70
60
90
80
100
VOUT1 = 3.3V
A: VIN = 1.5V
B: VIN = 2.4V
C: VIN = 2.7V
0.01
0.1
10
0
30
20
50
40
70
60
90
80
100
1
10
100
1000
EFFICIENCY vs. OUTPUT CURRENT
(VOUT1 = 5.0V, BOOTSTRAPPED)
MAX863
toc02
OUTPUT CURRENT (mA)
EFFICIENCY
(%)
VOUT1 = 5.0V
A: VIN = 1.5V
B: VIN = 2.4V
C: VIN = 2.7V
D: VIN = 3.3V
E: VIN = 3.6V
F: VIN = 4.0V
B
C
A
D
E
F
0.01
0.1
0
10
20
30
40
50
60
70
80
90
100
1
10
100
1000
EFFICIENCY vs. OUTPUT CURRENT
(VOUT1 = 5.0V, NON-BOOTSTRAPPED)
MAX863
toc03
OUTPUT CURRENT (mA)
EFFICIENCY
(%)
VOUT1 = 5.0V
A: VIN = 2.7V
B: VIN = 3.3V
C: VIN = 3.6V
D: VIN = 4.0V
A
B
C
D
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