參數(shù)資料
型號： TPS65820RSHTG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： 8-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC56
封裝： 7 X 7 MM, GREEN, PLASTIC, QFN-56
文件頁數(shù)： 6/98頁
文件大?。?/td> 2290K
代理商： TPS65820RSHTG4
ELECTRICAL CHARACTERISTICS – SWITCHED MODE SM2 STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS – GPIOs
SLVS663B – MAY 2006 – REVISED APRIL 2008 .............................................................................................................................................................. www.ti.com
Over recommended operating conditions (typical values at TJ = 25°C), VO(SM1) = 1.24 V, application circuit as in Figure 3
(unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Not
10
IQ(SM2) = I(VIN_ SM2), no output load
switching
IQ(SM2)
Quiescent current for SM2
A
SM2 OFF, set via I2C
0.1
IO(SM2)
Output current range
600
mA
Available output
voltages: VO(SM2)TYP =
Output voltage, selectable via I2C, standby OFF
1 V to 3.4 V, adjustable
in 80 mV steps
V
Available output
VO(SM2) = VSBY(SM2), output voltage range, standby
voltages: VSBY(SM2) = 1
ON
V to 3.4 V, adjustable in
80 mV steps
VO(SM2)
Output voltage
Total accuracy, VO(SM2)TYP = VSM2(SBY) = 1.8 V,
V(VIN_SM2) = greater of [3 V or (VO(SM2) + 0.3 V)]
–3%
3%
to 4.7 V; 0 mA
≤ IO(SM2) ≤ 600 mA
Line regulation, V(VIN_SM2) = greater of
%/V
[3 V or (VO(SM2) + 0.3 V)]
0.027
to 4.7 V; 0 mA
≤ IO(SM2) ≤ 600 mA
Load regulation, V(VIN_SM2) = 4.7 V,
0.139
%/A
IO(SM2): 60 mA → 540 mA
P-channel MOSFET
RDSON(PSM2)
V(VIN_SM2) = 3.6 V, 100% duty cycle set
310
500
m
on-resistance
ILKG(PSM2)
P-channel leakage current
0.1
A
N-channel MOSFET
RDSON(NSM2)
V(VIN_SM2) = 3.6 V, 0% duty cycle set
220
330
m
on-resistance
ILKG(PSM2)
N-channel leakage current
5
A
ILIM(SM2)
P- and N-channel current limit
3 V < V(VIN_SM2) < 4.7 V, TPS65820
900
1050
1200
mA
fS(SM2)
Oscillator frequency
PWM mode set
1.3
1.5
1.7
MHz
V(VIN_SM2) = 4.2 V, IO(SM2) = 300 mA,
EFF(SM2)
Efficiency
90%
VO(SM2) = 3 V
Converter OFF
→ON, VO(SM2) : 5% → 95% of target
tSS(SM2)
Soft start ramp time
750
s
value
tDLY(SM2)
Converter turn-on delay
GPIO2 pin programmed as SM2 converter enable
170
s
control. Measured from V(GPIO2): LO
→ HI
Over recommended operating conditions (typical values at TJ = 25°C), application circuit as in Figure 3 (unless otherwise
noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
GPIO1–3
VOL
Low level output voltage GPIO0
IOL = 20 mA
0.5
V
IOGPIO
Low level sink current into GPIO1, 2, 3
V(GPIOn) = V(OUT)
20
mA
VIL
Low level input voltage
0.4
V
ILKG(GPIO)
Input leakage current
V(GPIOn) = V(OUT)
1
A
14
Copyright 2006–2008, Texas Instruments Incorporated
Product Folder Link(s): TPS65820
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