參數(shù)資料
型號(hào)： UPC1935
廠商： NEC Corp.
元件分類： DC/DC變換器
英文描述： DC-DC CONVERTER CONTROL IC
中文描述： 的DC - DC轉(zhuǎn)換器控制IC
文件頁(yè)數(shù)： 6/28頁(yè)
文件大?。?/td> 185K
代理商： UPC1935
Data Sheet G13418EJ3V0DS00
6
μ
PC1935
Electrical Characteristics (unless otherwise specified, T
A
=
25
°
C, V
CC
=
3 V, f
OSC
= 100 kHz)
Block
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Start-up voltage
V
CC (L-H)
I
REF
= 0.1 mA
1.57
V
Operation stop voltage
V
CC (H-L)
I
REF
= 0.1 mA
1.5
V
Hysteresis voltage
V
H
I
REF
= 0.1 mA
30
70
mV
Under
voltage
lock-out
section
Reset voltage (timer latch)
V
CCR
I
REF
= 0.1 mA
1.0
V
Reference voltage
V
REF
I
REF
= 1 mA
2.0
2.1
2.2
V
Line regulation
REG
IN
2.5 V
≤
V
CC
≤
20 V
2
12.5
mV
Load regulation
REG
L
0.1 mA
≤
I
REF
≤
1 mA
1
7.5
mV
Reference
voltage
section
Temperature coefficient
V
REF
/
T
20
°
C
≤
T
A
≤+
85
°
C, I
REF
= 0 A
0.5
%
f
OSC
setting accuracy
f
OSC
R
T
= 18 k
20
+
30
%
Oscillation
section
f
OSC
total stability
f
OSC
20
°
C
≤
T
A
≤+
85
°
C,
2.5 V
≤
V
CC
≤
20 V
30
+
50
%
Input bias current
I
BD
(Channels 2 and 3 only)
1.0
μ
A
Channel 1 maximum duty
D
MAX.
85
%
Channel 1 soft start time
t
SS
C
DLY
= 0.1
μ
F
50
ms
Low-level threshold voltage
V
TH (L)
Duty = 0 % (channels 1 and2)
Duty = 100 % (channel 3)
1.2
V
Duty setting
section
High-level threshold voltage
V
TH (H)
Duty = 100 % (channel 2)
Duty = 0 % (channel 3)
1.6
V
Input threshold voltage
V
ITH
0.285
0.3
0.315
V
Input bias current
I
B
100
+
100
nA
Open loop gain
A
v
V
O
= 0.3 V
70
80
dB
Unity gain
f
unity
V
OM
+
V
OM
V
O
= 0.3 V
1.5
MHz
Maximum output voltage (
+
)
I
O
=
45
μ
A
1.6
2
V
Maximum output voltage (
)
I
O
= 45
μ
A
0.02
0.5
V
Maximum sink current
I
Osink
V
FB
= 0.5 V
0.8
1.4
μ
A
Error
amplifier
section
Output source current
I
Osource
V
FB
= 1.6 V
70
45
μ
A
Output ON voltage
V
OL
R
L
= 150
0.2
0.6
V
Rise time
t
r
R
L
= 150
50
ns
Output
section
Fall time
t
f
R
L
= 150
50
ns
Input sense voltage
V
TH1
, V
TH2
Channels 1 and 2
1.75
1.9
2.05
V
V
TH3
Channel 3
0.5
0.63
0.75
V
UV sense voltage
V
UV
0.8
0.85
V
Source current on short-circuiting
I
OUV
1.0
1.6
2.7
μ
A
Short-circuit
protection
section
Delay time
t
DLY
C
DLY
= 0.1
μ
F
50
ms
Overall
Circuit operation current
I
CC
V
CC
= 3 V
1.8
3.1
5.1
mA
Caution Connect a capacitor of 0.01 to 10
μ
F to the V
REF
pin.
2
4
PC1935
μ
C
REF
= 0.01 to 10 F
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