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| 型号： | TPS2501DRCT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 6 A SWITCHING REGULATOR, 1075 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, 0.90 MM HEIGHT, PLASTIC, SON-10 |
| 文件页数： | 23/41页 |
| 文件大小： | 1641K |
| 代理商： | TPS2501DRCT |
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www.ti.com
SLVS886C – OCTOBER 2008 – REVISED AUGUST 2010
Table 1. RECOMMENDED EXTERNAL COMPONENTS
MIN
NOM
MAX
UNIT
L
Inductor (nominal value)
2.2
4.7
mH
CIN
Input capacitance on IN (ceramic capacitor, X5R, 10V, 0805)
10
mF
Boost output capacitance on AUX (ceramic capacitor, X5R, 10V, 1210)
22
CAUX
mF
Additional AUX capacitance
150
RILIM
Current-limit set resistor from ILIM to GND (recommended 1% or better)
16.1
200
k
ELECTRICAL CHARACTERISTICS — Shared Boost and USB Section
over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
BIAS
VIN
13
20
Quiescent
VIN = 3.3 V, VAUX = 5.2 V, VEN = VIN, VENUSB = VAUX,
mA
current
IAUX = IUSB = 0 A
VAUX
380
480
Shutdown
VIN = 3.3 V, VEN = VENUSB = 0 V, AUX and USB OPEN,
VIN
4
8
mA
current
–40°C
≤ TJ ≤ 85°C
UVLO
Rising
2.08
2.2
Falling
1.69
1.8
After VAUX in
Undervoltage lockout threshold on
regulation
VIN
Hysteresis
0.4
V
IN for boost converter
Falling
1.93
2.05
Before VAUX in
regulation
Hysteresis
0.15
Rising
4.18
4.3
4.45
Undervoltage lockout threshold on
VAUX
Falling
4.1
4.21
4.37
V
AUX for USB switch
Hysteresis
0.09
THERMAL SHUTDOWN
Full thermal shutdown threshold
150
Hysteresis
10
°C
USB-only thermal shutdown
130
Hysteresis
10
ELECTRICAL CHARACTERISTICS — Boost Section Only
over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
APPLICATION SPECIFICATIONS
VAUX
AUX regulation voltage
4.95
5.1
5.25
V
OSCILLATOR
Switching frequency, normal mode
VIN < VLFM
925
1000
1075
freq
kHz
Switching frequency, low-frequency mode
VIN > VLFM
230
250
270
VIN rising
4.25
4.35
4.45
V
VLFM
Low-frequency mode input voltage threshold
Hysteresis
200
mV
VIN rising
4.9
5.05
5.17
V
No-frequency mode input voltage threshold
VNFM
(boost SYNC MOSFET always on)
Hysteresis
75
mV
Maximum duty cycle
85
%
Minimum controllable on-time
85
ns
Eco-mode CONTROL SCHEME, PULSED FREQUENCY OPERATION (TPS2500 ONLY)
IINDLOW
Demanded peak current to enter PFM mode
Peak inductor current, falling
420
mA
0.98 ×
AUXLOW
AUX-too-low comparator threshold
Resume switching due to AUX, falling
V
VAUX
Copyright 2008–2010, Texas Instruments Incorporated
3
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