参数资料
型号: LTC1702IGN#TRPBF
厂商: Linear Technology
文件页数: 3/36页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM VM 24-SSOP
标准包装: 2,500
系列: PolyPhase®
PWM 型: 电压模式
输出数: 2
频率 - 最大: 750kHz
占空比: 93%
电源电压: 3 V ~ 7 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 24-SSOP(0.154",3.90mm 宽)
包装: 带卷 (TR)
LTC1702
ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are TA = 25 ° C. V CC = 5V unless otherwise specified. (Note 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Switching Characteristics
f OSC
Oscillator Frequency
Test Circuit 1, C L = 0pF
475
550
750
kHz
Φ OSC2
Converter 2 Oscillator Phase
Relative to Converter 1 (Note 6)
180
DEG
DC MIN1
DC MIN2
Minimum Duty Cycle
Minimum Duty Cycle
V FB < V MAX
V FB > V MAX
7
0
10
%
%
DC MAX
Maximum Duty Cycle
87
90
93
%
t NOV
t r , t f
Driver Nonoverlap
Driver Rise/Fall Time
Test Circuit 1, C L = 2000pF (Note 7)
Test Circuit 1, C L = 2000pF (Note 7)
40
12
100
80
ns
ns
Feedback Amplifier
A VFB
GBW
I ERR
FB DC Gain
FB Gain Bandwidth
FB Sink/Source Current
74
± 3
85
25
± 10
dB
MHz
mA
V MIN
MIN Comparator Threshold
760
785
mV
V MAX
MAX Comparator Threshold
815
840
mV
Current Limit Loop
A VILIM
I LIM Gain
40
dB
I IMAX
I MAX Source Current
I MAX = 0V, LTC1702C
I MAX = 0V, LTC1702I
–7
–7
–10
–10
–13
–14
μ A
μ A
Status Outputs
V PGOOD
V OLPG
I PGOOD
t PGOOD
V FAULT
V OLF
PGOOD Trip Point
PGOOD Output Low Voltage
PGOOD Output Leakage
PGOOD Delay Time
FAULT Trip Point
FAULT Output Low Voltage
V FB Relative to Regulated V OUT
PGOOD = 1mA
V FB < V PGOOD to PGOOD
(Note 7)
V FB Relative to Regulated V OUT
I FAULT = 1mA
– 10
+ 10
–5
0.03
± 0.1
100
+ 15
0.03
–2
0.1
± 1
+ 20
0.1
%
V
μ A
μ s
%
V
I FAULT
FAULT Output Current
V FAULT = 0V
– 10
μ A
t FAULT
FAULT Delay Time
V FB > V FAULT to FAULT
(Note 7)
25
μ s
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: PV CC and BV CC (V BOOST – V SW ) must be greater than V GS(ON) of
the external MOSFETs used to ensure proper operation.
Note 3: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified.
Note 4: Supply current in normal operation is dominated by the current
needed to charge and discharge the external MOSFET gates. This current
will vary with supply voltage and the external MOSFETs used.
Note 5: Supply current in shutdown is dominated by external MOSFET
leakage and may be significantly higher than the quiescent current drawn
by the LTC1702, especially at elevated temperature.
Note 6: This parameter is guaranteed by correlation and is not tested
directly.
Note 7: Rise and fall times are measured using 10% and 90% levels. Delay
and nonoverlap times are measured using 50% levels.
1702fa
3
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