Texas Instruments TPS65820 Evaluation Module TPS65820EVM TPS65820EVM データシート
製品コード
TPS65820EVM
ELECTRICAL CHARACTERISTICS – SWITCHED MODE SM1 STEP-DOWN CONVERTER
www.ti.com
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SLVS663B – MAY 2006 – REVISED APRIL 2008
Over recommended operating conditions (typical values at T
J
= 25
°
C), V
O(SM1)
= 1.24 V, application circuit as in
(unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
I
Q(SM1)
= I(VIN_ SM1), no output load
Not switching
10
I
Q(SM1)
Quiescent current for SM1
µ
A
SM1 OFF, set via I
2
C
0.1
I
O(SM1)
Output current range
600
mA
Available output
voltages: V
O(SM1)TYP
=
Output voltage, selectable via I
2
C, standby OFF
0.6 V to 1.8 V,
adjustable in 40 mV
steps
V
Available output
voltages: V
SBY(SM1)
=
V
O(SM1)
= V
SBY(SM1)
, output voltage range, standby ON
0.6 V to 1.8 V,
V
O(SM1)
Output voltage, PWM mode
adjustable in 40 mV
steps
Total accuracy, V
O(SM1)TYP
= V
SBY(SM1)
= 1.24 V,
–3%
3%
V(VIN_SM1) = 3 V to 4.7 V; 0 mA
≤ I
O(SM1)
≤ 600 mA
Line regulation, V(VIN_SM1): 3 V
→ 4.7 V,
0.027
%/V
I
O(SM1)
= 10 mA
Load regulation, V(VIN_SM1) = 4.7 V,
0.139
%/A
I
O(SM1)
: 60 mA
→ 540 mA
P-channel MOSFET
R
DSON(PSM1)
V(VIN_SM1) = 3.6 V, 100% duty cycle set
310
500
m
Ω
on-resistance
I
LKG(PSM1)
P-channel leakage current
0.1
µ
A
N-channel MOSFET
R
DSON(NSM1)
V(VIN_SM1) = 3.6 V, 0% duty cycle set
220
330
m
Ω
on-resistance
I
LKG(PSM1)
N-channel leakage current
5
µ
A
I
LIM(SM1)
P- and N-channel current limit
3 V < V(VIN_SM1) < 4.7 V
900
1050
1200
mA
f
S(SM1)
Oscillator frequency
PWM mode set
1.3
1.5
1.7
MHz
V(VIN_SM1) = 4.2 V, PWM mode, I
O(SM1)
= 300 mA,
EFF
(SM1)
Efficiency
90%
V
O(SM1)
= 3 V
Converter OFF
→ON, V
O(SM1)
: 5%
→ 95% of target
t
SS(SM1)
Soft start ramp time
750
µ
s
value
t
DLY(SM1)
GPIO1 pin programmed as SM1 converter enable
Converter turn-on delay
170
µ
s
control. Measured from V(GPIO1): LO
→ HI
Copyright © 2006–2008, Texas Instruments Incorporated
13
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