参数资料
型号: MAS3587F
厂商: Electronic Theatre Controls, Inc.
元件分类: 通用总线功能
英文描述: MPEG Layer 3 Audio Encoder/Decoder
中文描述: MPEG层3音频编码器/解码器
文件页数: 76/83页
文件大小: 734K
代理商: MAS3587F
MAS 3587F
ADVANCE INFORMATION
76
Micronas
4.6.5. DC/DC Converter Characteristics
at T
A
= T
A2
, V
in
= 1.2 V (unless otherwise noted), V
outn
= 3.0 V, f
clk
= 18.432 MHz, f
sw
= 384 kHz,
Typ. values for T
A
= 25
°
C
Symbol
Parameter
Pin Name
Min.
Typ.
Max.
Unit
Test Conditions
V
IN
Minimum start-up input
voltage
*
0.9
V
I
LOAD
1 mA,
DCCF = 5050
hex
(reset)
V
IN
Minimum operating input
voltage
DC1*
DC2*
0.7
0.8
V
I
LOAD
= 50 mA,
DCCF = 5050
hex
(reset)
DC1*
DC2*
1.1
1.2
V
I
LOAD
= 200 mA,
DCCF = 5050
hex
(reset)
V
OUT
Programmable output voltage
range
VSENSN
2.0
3.5
V
Voltage settings in DCCF
register (I
2
C subaddress
76
hex
)
V
OTOL
Output voltage tolerance
VSENSN
2.88
3.12
V
I
LOAD
= 20 mA
T
A
=
25
°
C
I
LOAD1
Output current
1 battery cell
VSENSN
200
mA
V
IN
= 0.9...1.5 V, 330
μ
F
I
LOAD2
Output current
2 battery cells
600
mA
V
IN
= 1.8...3.0 V, 330
μ
F
dV
OUT
/
dV
IN
/V
OUT
Line regulation
VSENSN
0.8
%/V
dV
OUT
/
V
OUT
Load regulation
DC1
DC2
VSENS1
VSENS2
1.7
1.8
%
I
LOAD
= 20...200 mA,
h
max
Maximum efficiency
95
%
V
IN
= 2.4 V, V
OUT
= 3.5 V
f
switch
Switching frequency
DCSOn
297
384
576
kHz
(see Section 2.9.2. on
page 11)
f
startup
Switching frequency during
start-up
DCSOn
250
kHz
VSENSn < 1.9 V
I
supPFM1
Supply current in PFM mode
VSENS1
75
μA
1)
I
supPFM2
VSENS2
135
I
supPWM1
Supply current in PWM mode
VSENS1
265
μA
VSENSn
1)
2)
I
supPWM2
VSENS2
325
I
lnmax
NMOS switch current limit
(low side switch)
DCSOn,
DCSGn
1
A
I
lptoff
PMOS switch turnoff current
(rectifier switch)
DCSOn,
VSENSn
70
mA
I
LEAK
leakage current
DCSOn,
DCSGn
0.1
μ
A
T
j
= 25
°
C, converter off,
I
LOAD
= 0
μ
A
1)
Current into VSENSn. VIN > VOUT+
V; (
V
0.4 V); no DC/DC-Converter regulation switching action present
2)
Add. current of oscillator at PIN AVDD0/1, (see Section 4.6.4. on page 72)
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