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UPC1934 Datasheet(Fiches technique) 6 Page - NEC

Numéro de pièce UPC1934
Description  DC-DC CONVERTER CONTROL IC
Télécharger  20 Pages
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Fabricant  NEC [NEC]
Site Internet  http://www.nec.com/
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Data Sheet G13567EJ3V0DS00
6
µµµµ PC1934
Electrical Characteristics (unless otherwise specified, TA
= 25 °°°°C, VCC ==== 3 V, fOSC = 100 kHz)
Block
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Start-up voltage
VCC (L-H)
IREF = 0.1 mA
1.57
V
Operation stop voltage
VCC (H-L)
IREF = 0.1 mA
1.5
V
Hysteresis voltage
VH
IREF = 0.1 mA
30
70
mV
Under
voltage
Lock-out
section
Reset voltage (timer latch)
VCCR
IREF = 0.1 mA
1.0
V
Reference voltage
VREF
IREF = 1 mA
2.0
2.1
2.2
V
Line regulation
REGIN
2.5 V
≤VCC≤20 V
2
12.5
mV
Load regulation
REGL
0.1 mA
≤IREF≤1 mA
2
7.5
mV
Reference
Voltage
section
Temperature coefficient
∆VREF/∆T −20 °C≤TA≤+85 °C, IREF = 0 A
0.5
%
fOSC setting accuracy
∆fOSC
RT = 11 k
Ω, CT = 330 pF
−15
+15
%
Oscillation
section
fOSC total stability
∆fOSC
−20 °C≤TA≤+85 °C,
2.5 V
≤VCC≤20 V
−30
+30
%
Input bias current
IBD
0.4
1.0
µ A
Low-level threshold voltage
VTH (L)
Duty = 100 %
1.2
V
Dead time
control
section
High-level threshold voltage
VTH (H)
Duty = 0 %
1.6
V
Input offset voltage
VIO
−10
+10
mV
Input offset current
IIO
−100
+100
nA
Input bias current
IB
−100
+100
nA
Common mode input voltage range
VIMC
00.4
V
Open loop gain
Av
VO = 0.3 V
70
80
dB
Unity gain
funity
VO = 0.3 V
1.5
MHz
Maximum output voltage (
+)
VOM
+
IO =
−45
µ A1.6
2
V
Maximum output voltage (
−)
VOM
IO = 45
µ A
0.02
0.5
V
Output sink current
IOsink
VFB = 0.5 V
0.8
1.4
mA
Error
Amplifier
section
Output source current
IOsource
VFB = 1.6 V
−70
−45
µ A
Drain cutoff current
ILEAK
VO = 30 V
100
µ A
Output ON voltage
VOL
RL = 150
0.2
0.6
V
Rise time
tr
RL = 150
50
ns
Output
section
Fall time
tf
RL = 150
60
ns
Input sense voltage
VTH
0.5
0.63
0.75
V
UV sense voltage
VUV
0.6
0.8
0.95
V
Source current on short-circuiting
IOUV
1.0
1.6
2.5
µ A
Short-circuit
Protection
section
Delay time
tDLY
CDLY = 0.1
µ F50
ms
Overall
Circuit operation current
ICC
VCC = 3 V
1.4
2.2
3.7
mA
Caution Connect a capacitor of 0.01 to 10
µµµµ F to the VREF pin.
CREF = 0.01 to 10 F
µ
µPC1934
16
8




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