ncp1597 ON Semiconductor, ncp1597 Datasheet - Page 4

• Manufacturer Part Number: ncp1597
• Description: 1 Mhz, 2.0 A Synchronous Buck Regulator
• Manufacturer: ON Semiconductor

ELECTRICAL CHARACTERISTICS
(V
FEEDBACK VOLTAGE
GM AMPLIFIER
PWM
CURRENT SENSE AMPLIFIER
PULSE−BY−PULSE CURRENT LIMIT
OSCILLATOR
MOSFET
ENABLE
SOFT−START
THERMAL SHUTDOWN
1. Guaranteed by design.
V
V
UVLO Hysteresis
V
V
V
Reference Voltage
Feedback Input Bias Current
Feedback Voltage Line Regulation
Gm Amp Open Loop Voltage Gain
(Note 1)
Gm Amp Transconductance
Maximum Duty Cycle
Minimum Controllable ON Time
Current Sense to COMP
Transconductance
Pulse−by−Pulse Current Limit
Oscillator Frequency
Oscillator Frequency Accuracy
High Side MOSFET ON Resistance
High Side MOSFET Leakage (Note 1)
Low Side MOSFET ON Resistance
Low Side MOSFET Leakage (Note 1)
EN HI Threshold
EN LO Threshold
EN Hysteresis
EN Input Voltage
EN Pull−Down Resistor
Soft−Start Ramp Time
Hiccup Timer
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
in
CC
CC
CCP
in
in
Input Voltage Range
Shutdown Supply Current
= 4.0 V − 5.5 V, V
UVLO Threshold
Quiescent Current
Quiescent Current
Parameter
out
= 1.2 V, T
A
= +25°C for typical value; −40°C < T
gm
gm
Symbol
I
I
R
R
R
R
QSHDN
ENLO
I
inVCCP
AV
ENHI
inVCC
F
POWER
I
DS(on)
DS(on)
DS(on)
DS(on)
V
I
t
V
COMP
LIM
HS
HS
LS
LS
FB
SS
SW
ref
in
gm
V
V
http://onsemi.com
in
in
V
V
= 5.0 V, V
= 5.0 V,V
FB
FB
I
I
DS
DS
I
I
= V
> 0.75 V, DI
DS
DS
V
V
= 100 mA, V
= 100 mA, V
EN
EN
4
comp
= 100 mA, V
= 100 mA, V
Test Conditions
FB
F
V
FB
= 0 V, V
= 0 V, V
V
SW
FB
EN = 0 V
FB
A
, V
= 1.5 V, (No Switching)
= 1.5 V, (No Switching)
< 85°C for min/max values unless noted otherwise)
= COMP
= 1 MHz
= 0.8 V
in
COMP
= 2.7 V to 6.0 V
SW
SW
GS
GS
GS
GS
= 0 V
= 5 V
= $10 mA
= 3.3 V
= 3.3 V
= 5 V
= 5 V
0.788
0.87
Min
190
4.0
3.5
2.6
1.4
0.8
1.6
55
0.800
0.88
Typ
200
200
200
250
135
150
300
100
160
3.7
0.9
3.0
1.0
1.0
2.0
10
40
0.812
$13
Max
0.03
1.13
100
210
100
5.5
3.9
1.0
1.0
3.4
0.4
5.5
1.2
2.4
10
50
10
10
mA/V
MHz
Unit
%/V
A/V
mW
mW
mV
mA
mV
ms
ms
mA
mA
nA
dB
mA
mA
kW
ns
°C
°C
%
%
V
V
V
A
V
V
V