參數(shù)資料
型號(hào)： 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)： 5/98頁
文件大?。?/td> 2290K
代理商： TPS65820RSHTG4
ELECTRICAL CHARACTERISTICS – SWITCHED MODE SM1 STEP-DOWN CONVERTER
www.ti.com .............................................................................................................................................................. SLVS663B – MAY 2006 – REVISED APRIL 2008
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
IQ(SM1) = I(VIN_ SM1), no output load
Not switching
10
IQ(SM1)
Quiescent current for SM1
A
SM1 OFF, set via I2C
0.1
IO(SM1)
Output current range
600
mA
Available output
voltages: VO(SM1)TYP =
Output voltage, selectable via I2C, standby OFF
0.6 V to 1.8 V,
adjustable in 40 mV
steps
V
Available output
voltages: VSBY(SM1) =
VO(SM1) = VSBY(SM1), output voltage range, standby ON
0.6 V to 1.8 V,
VO(SM1)
Output voltage, PWM mode
adjustable in 40 mV
steps
Total accuracy, VO(SM1)TYP = VSBY(SM1) = 1.24 V,
–3%
3%
V(VIN_SM1) = 3 V to 4.7 V; 0 mA
≤ IO(SM1) ≤ 600 mA
Line regulation, V(VIN_SM1): 3 V
→ 4.7 V,
0.027
%/V
IO(SM1) = 10 mA
Load regulation, V(VIN_SM1) = 4.7 V,
0.139
%/A
IO(SM1): 60 mA → 540 mA
P-channel MOSFET
RDSON(PSM1)
V(VIN_SM1) = 3.6 V, 100% duty cycle set
310
500
m
on-resistance
ILKG(PSM1)
P-channel leakage current
0.1
A
N-channel MOSFET
RDSON(NSM1)
V(VIN_SM1) = 3.6 V, 0% duty cycle set
220
330
m
on-resistance
ILKG(PSM1)
N-channel leakage current
5
A
ILIM(SM1)
P- and N-channel current limit
3 V < V(VIN_SM1) < 4.7 V
900
1050
1200
mA
fS(SM1)
Oscillator frequency
PWM mode set
1.3
1.5
1.7
MHz
V(VIN_SM1) = 4.2 V, PWM mode, IO(SM1) = 300 mA,
EFF(SM1)
Efficiency
90%
VO(SM1) = 3 V
Converter OFF
→ON, VO(SM1) : 5% → 95% of target
tSS(SM1)
Soft start ramp time
750
s
value
tDLY(SM1)
GPIO1 pin programmed as SM1 converter enable
Converter turn-on delay
170
s
control. Measured from V(GPIO1): LO
→ HI
Copyright 2006–2008, Texas Instruments Incorporated
13
Product Folder Link(s): TPS65820
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