參數(shù)資料
型號： TPS6205
廠商： Texas Instruments, Inc.
英文描述： 800-mA SYNCHRONOUS STEP-DOWN CONVERTER
中文描述： 800毫安同步降壓轉(zhuǎn)換器
文件頁數(shù)： 3/21頁
文件大?。?/td> 432K
代理商： TPS6205
www.ti.com
TPS62050, TPS62051
TPS62052, TPS62054, TPS62056
SLVS432D–SEPTEMBER 2002–REVISED OCTOBER 2003
ELECTRICAL CHARACTERISTICS
V
I
=7.2 V, V
O
= 3.3 V, I
O
= 300 mA, EN = V
I
, T
A
=-40
°
C to 85
°
C unless otherwise noted
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY CURRENT
V
I
Input voltage range
2.7
10
V
I
O
= 0 mA, SYNC = GND,
V
I
= 7.2 V
EN = GND
I
(Q)
Operating quiescent current
12
20
μA
1.5
5
I
(SD)
Shutdown current
μA
EN = GND, T
A
=25
°
C
EN = V
, LBI=GND,
TPS62051 only
1.5
3
Quiescent current with enhanced LBI
comparator version.
I
Q(LBI)
5
μA
ENABLE
V
IH
V
IL
EN high level input voltage
1.3
V
EN low level input voltage
0.3
V
EN trip point hysteresis
100
mV
I
lkg
I
(EN)
V
(UVLO)
POWER SWITCH
EN input leakage current
EN = GND or VIN, V
I
=7.2 V
0.6 V
≤
V
(EN)
≤
4 V
0.01
0.2
μA
EN input current
2
μA
Undervoltage lockout threshold
1.6
V
V
I
≥
5.4 V; I
O
= 300 mA
V
I
= 2.7 V; I
O
= 300 mA
V
DS
= 10 V
V
I
= 7.2V, V
O
= 3.3 V
V
I
≥
5.4 V; I
O
= 300 mA
V
I
= 2.7 V; I
O
= 300 mA
V
DS
= 6 V
400
650
r
DS(on)
P-channel MOSFET on-resistance
m
600
850
P-channel MOSFET leakage current
1
μA
P-channel MOSFET current limit
1000
1200
1400
mA
300
450
r
DS(on)
N-channel MOSFET on-resistance
m
450
550
N-channel MOSFET leakage current
1
μA
POWER GOOD OUTPUT, LBI, LBO
V
(PG)
Power good trip voltage
Vml -2%
V
V
O
ramping positive
V
O
ramping negative
V
(FB)
= 0.8 x V
O
nominal,
I
(sink)
= 1 mA
V
(FB)
= V
O
nominal,
V
(LBI)
= V
I
50
μs
Power good delay time
200
V
OL
PG, LBO output low voltage
0.3
V
PG, LBO output leakage current
0.01
0.25
μA
Minimum supply voltage for valid power
good, LBO signal
2.3
V
V
(LBI)
Low battery input trip voltage
Input voltage falling
1.21
V
Low battery input trip point accuracy
1.5%
V
(LBI,HYS)
I
lkg(LBI)
OSCILLATOR
Low battery input hysteresis
15
mV
LBI leakage current
0.01
0.1
μA
f
S
f
(SYNC)
V
IH
V
IL
I
lkg
Oscillator frequency
600
850
1000
kHz
Synchronization range
600
1200
kHz
SYNC high level input voltage
1.5
V
SYNC low level input voltage
0.3
V
SYNC input leakage current
SYNC = GND or VIN
0.01
0.1
μA
SYNC trip point hysteresis
100
mV
Duty cycle of external clock signal
20%
90%
OUTPUT
Adjustable output voltage
range
TPS62050,
TPS62051
V
O
0.7
6.0
V
TPS62050,
TPS62051
V
(FB)
Feedback voltage
0.5
V
TPS62050,
TPS62051
FB leakage current
0.02
0.1
μA
3
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