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参数资料
| 型号： | TPS650240RHBR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32 |
| 封装： | 5 X 5 MM, GREEN, PLASTIC, QFN-32 |
| 文件页数： | 32/35页 |
| 文件大小： | 955K |
| 代理商： | TPS650240RHBR |
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ELECTRICAL CHARACTERISTICS
SLVS774B – JUNE 2007 – REVISED JULY 2009 .............................................................................................................................................................. www.ti.com
VINDCDC1 = VINDCDC2 = VINDCDC3 = VCC = VINLDO = 3.6V, TA = –40°C to 85°C, typical values are at TA = 25°C
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VDCDC2 STEP-DOWN CONVERTER
VVINDCDC2
Input voltage range
2.5
6.0
V
IO
Maximum output current for
VO = 2.5V
800
mA
TPS650240, TPS650242 and
TPS650245
IO
Maximum output current for TPS650241
VO = 2.5V
1000
mA
and TPS650243
IO
Maximum output current for TPS650244
VO = 2.5V
1600
mA
ISD
Shutdown supply current in VINDCDC2
EN_DCDC2 = GND
0.1
1
A
RDS(ON)
P-channel MOSFET on-resistance
VINDCDC2 = VGS = 3.6V
140
300
m
ILP
P-channel leakage current
VINDCDC2 = 6.0V
2
A
RDS(ON)
N-channel MOSFET on-resistance
VINDCDC2 = VGS = 3.6V
150
297
m
ILN
N-channel leakage current
VDS = 6.0V
7
10
A
ILIMF
Forward current limit (P- and N-channel)
2.5V < VINDCDC2 < 6.0V
1.05
1.16
1.29
A
for TPS650240, TPS650242 and
TPS650245
ILIMF
Forward current limit (P- and N-channel)
2.5V < VINDCDC2 < 6.0V
1.22
1.35
1.50
A
for TPS650241 and TPS650243
ILIMF
Forward current limit (P- and N-channel)
2.5V < VINDCDC2 < 6.0V
1.75
1.97
2.15
A
for TPS650244
fS
Oscillator frequency
1.95
2.25
2.55
MHz
VDCDC2
Fixed output voltage
1.8V
VINDCDC2 = 2.5V to 6.0V; 0 mA
≤ IO ≤
–2%
2%
MODE = 0 (PWM/PFM)
1.6A
2.5V
VINDCDC2 = 3.0V to 6.0V; 0 mA
≤ IO ≤
–2%
2%
1.6A
Fixed output voltage
1.8V
VINDCDC2 = 2.5V to 6.0V; 0 mA
≤ IO ≤
–2%
2%
MODE = 1 (PWM)
1.6A
2.5V
VINDCDC2 = 3.0V to 6.0V; 0 mA
≤ IO ≤
–1%
1%
1.6A
Adjustable output voltage with resistor
VINDCDC2 = VDCDC2 + 0.5V (min 2.5V)
–2%
2%
divider at DEFDCDC2 MODE = 0
to 6.0V; 0mA
≤ IO ≤ 1.6A
(PWM)
Adjustable output voltage with resistor
VINDCDC2 = VDCDC2 + 0.5V (min 2.5V)
–1%
1%
divider at DEFDCDC2; MODE = 1
to 6.0V; 0mA
≤ IO ≤ 1.6A
(PWM)
Line regulation
VINDCDC2 = VDCDC2 + 0.3 V (min. 2.5
0.0
%/V
V) to 6.0V; IO = 10mA
Load regulation
IO = 10mA to 1.6A
0.25
%/A
TSS
Soft start ramp time
VDCDC2 ramping from 5% to 95% of
750
s
target value
R(L2)
Internal resistance from L2 to GND
1
M
6
Copyright 2007–2009, Texas Instruments Incorporated
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