参数资料
型号: TPS650243RHBT
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: 33/35页
文件大小: 955K
代理商: TPS650243RHBT
ELECTRICAL CHARACTERISTICS
www.ti.com .............................................................................................................................................................. SLVS774B – JUNE 2007 – REVISED JULY 2009
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
VDCDC3 STEP-DOWN CONVERTER
VVINDCDC3
Input voltage range
2.5
6.0
V
IO
Maximum output current
VO = 1.6V
800
mA
ISD
Shutdown supply current in
EN_DCDC3 = GND
0.1
1
A
VINDCDC3
RDS(ON)
P-channel MOSFET on-resistance
VINDCDC3 = VGS = 3.6V
310
698
m
ILP
P-channel leakage current
VINDCDC3 = 6.0V
0.1
2
A
RDS(ON)
N-channel MOSFET on-resistance
VINDCDC3 = VGS = 3.6V
220
503
m
ILN
N-channel leakage current
VDS = 6.0V
7
10
A
ILIMF
Forward current limit (P- and
2.5V < VINDCDC3 < 6.0V
1.00
1.20
1.40
A
N-channel)
fS
Oscillator frequency
1.95
2.25
2.55
MHz
VDCDC3
Fixed output voltage
VO = 0.9V to
VINDCDC3 = 2.5V to 6.0V;
–2%
2%
MODE = 0
1.6V
0mA
≤ IO ≤ 800mA
(PWM/PFM)
Fixed output voltage
–1%
1%
MODE = 1 (PWM)
Line regulation
VINDCDC3 = VDCDC3 + 0.3V (min. 2.5 V) to
0.0
%/V
6.0V; IO = 10mA
Load regulation
IO = 10mA to 600mA
0.25
%/A
TSS
Soft start ramp time
VDCDC3 ramping from 5% to 95% of target
750
s
value
R(L3)
Internal resistance from L3 to GND
1
M
Copyright 2007–2009, Texas Instruments Incorporated
7
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