ncp1578 ON Semiconductor, ncp1578 Datasheet - Page 6

• Manufacturer Part Number: ncp1578
• Description: Synchronous Step Down Controller With 50ma Linear Regulator
• Manufacturer: ON Semiconductor

SUPPLY SECTION
UNDERVOLTAGE MONITOR
LINEAR REGULATOR
SMPS CONTROLLERS
ELECTRICAL CHARACTERISTICS
(V
Input Voltage
VBAT Operating Supply Current
VBAT Shutdown Current
LDO5 UVLO Lower Threshold
LDO5 Undervoltage Lockout
Hysteresis
LDO5 Input Voltage Range
LDO5 Output Voltage
LDO5 Maximum Output Current
FB Feedback Voltage, Control Loop
in Regulation
Operating Frequency
Ramp Amplitude
Ramp Amplitude to VIN Ratio
Minimum Duty Cycle
Maximum Duty Cycle
Voltage Error Amplifier DC Gain
Error Amplifier Unity Gain Bandwidth
Voltage Error Amplifier Slew Rate
OCSET Pin Current Sink
OCSET Pin Current Sink
Temperature Coefficient
TG Gate Driver Pull-High
Resistance
TG Gate Driver Pull-Low Resistance
BG Gate Driver Pull-High
Resistance
BG Gate Driver Pull-Low Resistance
Soft-start Current
PGDLY Delay Current
PGDLY Threshold
3. Guaranteed by design, not tested in production.
BAT
= 12 V, LDO5 = V
Characteristic
CCP
= 5 V, T
A
= -40 to 85°C, for min/max values unless otherwise noted. Typical values are at T
DVRAMP/DVIN
VLDO5UVHYS
VLDO5UV-
I
Vth
LDO5_IN
LDO5_MAX
Symbol
I
I
V
R
R
R
PG_DLY
TC
R
LDO5
BATSD
D
V
D
Gain
F
I
V
RAMP
PG_DLY
I
H_BG
SR
H_TG
L_TG
L_BG
BAT
I
Ft
OC
BAT
SW
max
min
ss
FB
IOC
Single Supply Configuration, See Figure 2
Ext +5 V and V
LDO5 & SMPS are Enabled, See Figure 2
TG and BG are 3 nF Capacitor Load
V
V
TG and BG are 3 nF Capacitor Load
V
V
EN_SW = 0 V
Falling Edge
V
Figure 3
V
0 to 50 mA
V
T
T
VOCSET = 12 V (Note 3)
VOCSET = 4.5 V to 24 V (Note 3)
VOCSET = 4.5 V to 24 V
(Note 3)
COMP to GND = 100 pF,
1.0 W in Series (Note 3)
(Note 3)
OCSET = 4.0 V
V
V
V
V
EN_SW = 5.0 V; Vss = 0 V
EN_SW = 5.0 V, V
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A
A
BAT
BAT
BAT
BAT
BAT
BAT
BAT
BST
BST
CCP
CCP
= 25°C
= -40 to 85°C
NCP1578
= 12 V
= LDO5 See Figure 3
= 5 V
= 6 V to 24 V, EN_LDO = 0 V,
= LDO5 for 5 V Configuration See
= 6 V to 24 V, EN_LDO > 1.4 V, I
= 6 V to 24 V, EN_LDO > 1.4 V
- V
- V
= 5 V, V
= 5 V, V
SWN
SWN
6
= 5 V, V
= 5 V, V
BG
BG
Test Conditions
IN
= 4 V
= 1 V
Configuration, See Figure 3
PG_DLY
TG
TG
- V
- V
= 0 V
SWN
SWN
= 4 V
= 1 V
LDO5
=
0.792
0.788
4.85
Min
270
6.0
4.5
4.5
2.8
1.4
50
90
34
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3200
1.02
1.25
Typ
330
300
4.1
5.0
5.0
0.8
0.8
3.0
1.5
1.5
1.5
0.9
4.0
2.0
10
83
70
40
-
2
-
-
-
-
2
A
= 25_C.)
0.808
0.812
Max
5.15
330
5.5
4.0
4.0
4.0
3.0
5.2
2.6
24
30
50
3
3
-
-
-
-
-
0
-
-
-
-
-
ppm/°C
mV/V
Unit
MHz
kHz
V/ìs
mA
mA
mV
mA
mA
dB
mA
mA
mA
%
%
W
W
W
W
V
V
V
V
V
V
V