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LM25037QMTX データシート(PDF) 6 Page - Texas Instruments

部品番号 LM25037QMTX
部品情報  Dual-Mode PWM Controller With Alternating Outputs
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ホームページ  http://www.ti.com
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LM25037QMTX データシート(HTML) 6 Page - Texas Instruments

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LM25037, LM25037-Q1
SNVS572E – JULY 2008 – REVISED JANUARY 2016
www.ti.com
Electrical Characteristics (continued)
VVIN = 12V, VVCC = 10V, RRT1 = 30.1 kΩ, RRT2 = 30.1 kΩ, VUVLO = 3 V, TJ =−40°C to +125° unless otherwise stated.
(1)(2)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
CURRENT LIMIT RESTART (RES PIN)
VRES
RES threshold
1.9
2
2.2
V
Charge source current
VRES = 1.5 V
14
18
21
µA
Discharge sink current
VRES = 1 V
5
8
11
µA
SOFT-START (SS PIN)
Charging current in normal
ISS
VSS = 0
70
100
130
µA
operation
Charging current during a
VSS = 0
0.6
1
1.4
µA
hiccup mode restart
Soft-stop current sink
VSS = 2 V
70
100
130
µA
OSCILLATOR (RT1 AND RT2 PINS)
DT1
Dead-time 1
RRT2 = 15 kΩ
40
75
105
ns
DT2
Dead-time 2
RRT2 = 50 kΩ
250
ns
Frequency 1 (at OUTA, half
FSW1
RRT1 = 30.1 kΩ, RRT2 = 30.1 kΩ,
178
200
222
kHz
oscillator frequency)
Frequency 2 (at OUTA, half
FSW2
RRT1 = 11 kΩ, RRT2 = 30.1 kΩ,
448
515
578
kHz
oscillator frequency)
DC level
2
V
Input sync threshold
2.5
3
3.4
V
PWM CONTROLLER (COMP PIN)
Delay to output
65
ns
VPWM-OS
SS to RAMP offset
0.7
1
1.2
V
Minimum duty cycle
VSS = 0 V
TJ = 25°C
0%
COMP open-circuit voltage
VFB = 0 V
4.5
4.75
5
V
COMP short-circuit current
VFB = 0 V, COMP = 0 V
0.5
1
1.5
mA
VOLTAGE FEED-FORWARD (RAMP PIN)
RAMP sink impedance
5
20
(clocked)
ERROR AMPLIFIER
GBW
Gain bandwidth
4
MHz
DC gain
75
dB
Input voltage
VFB = COMP
1.22
1.245
1.27
V
COMP sink capability
VFB = 1.5 V COMP = 1 V
TJ = 25°C
5
13
mA
FB bias current
10
nA
MAIN OUTPUT DRIVERS (OUTA and OUTB Pins)
Output high voltage
IOUT = 50 mA, (source)
Vcc-0.5
Vcc-0.25
V
Output low voltage
IOUT = 100 mA (sink)
0.2
0.5
V
Rise time
CLOAD = 1 nF
17
ns
Fall time
CLOAD = 1 nF
18
ns
Peak source current
VVCC = 10 V
1.2
A
Peak sink current
VVCC = 10 V
1.2
A
THERMAL SHUTDOWN
TSD
Thermal shutdown threshold
165
°C
Thermal shutdown hysteresis
25
°C
6
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Product Folder Links: LM25037 LM25037-Q1


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