HYM2596 Datasheet PDF - Haoyu


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HYM2596
Haoyu

Part Number HYM2596
Description Simple Switcher Power Converter 150KHz 3A Step-Down Voltage Regulator
Page 11 Pages

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HYM2596
HYM2596
Simple Switcher Power Converter 150KHz
3A Step-Down Voltwawgwe.DaRtaeSgheuetl4aUt.ocorm
Data Sheet
Features
Output Voltage: 3.3V, 5V, 12V and Adjustable
Output Version
Adjustable Version Output Voltage Range, 1.23V
to 37V±4%
150 KHz ±15% Fixed Switching Frequency
Voltage Mode Non-Synchronous PWM Control
Thermal-Shutdown and Current-Limit Protection
ON/OFF Shutdown Control Input
Operating Voltage Can be Up to 40V
Output Load Current: 3A
TO220-5L TO220-5L(R) and TO263-5L Packages
Low Power Standby Mode
Built-In Switching Transistor on Chip
Applications
Simple High-efficiency Step-Down Regulator
On-card Switching Regulators
Positive to Negative Converter
General Description
The HYM2596 series are monolithic IC that design
for a step-down DC/DC converter, and own the
ability of driving a 3A load without additional
transistor component. Due to reducing the number
of external component, the board space can be
saved easily. The external shutdown function can be
controlled by logic level and then come into standby
mode. The internal compensation makes feedback
control have good line and load regulation without
external design. Regarding protected function,
thermal shutdown is to prevent over temperature
operating from damage, and current limit is against
over current operating of the output switch. The
HYM2596 series operates at a switching frequency
of 150 KHz thus allowing smaller sized filter
components than what would be needed with lower
frequency switching regulators. Other features
include a guaranteed 14% tolerance on output
voltage under specified input voltage and output
load conditions, and ±15% on the oscillator
frequency. The output version included fixed 3.3V,
5V, 12V, and an adjustable type. The packages are
available in a standard 5-lead TO-220 package and
a 5-lead TO-263.
Block Diagram and Pin Diagram
Pin Assignment
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HYM2596
Block Diagram
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Pin Description
Pin Number
1
2
3
4
5
Symbol
+VIN
Output
GND
Feedback
Description
This is the positive input supply for the IC switching regulator. A suitable input
bypass capacitor must be present at this pin to minimize voltage transients
and to supply the switching currents needed by the regulator.
Internal switch. The voltage at this pin switches between (+VIN-VSAT) and
approximately 0.5V, with a duty cycle of approximately VOUT/VIN. To
minimize coupling to sensitive circuitry, the PC board copper area connected
to this pin should be kept to a minimum.
Circuit ground.
Senses the regulated output voltage to complete the feedback loop.
Pulling this pin below a threshold voltage of approximately 1.3V turns the
regulator on, and pulling this pin above 1.3V (up to a maximum of 25V) shuts
the regulator down. If this shutdown feature is not needed, the ON /OFF pin
can be wired to the ground pin or it can be left open, in either case the
regulator will be in the ON condition.
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HYM2596
Typical Application (Fixed Output Voltage Versions)
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Absolute Maximum Rating
Parameter
Maximum Supply Voltage
ON/OFF Pin Input Voltage
Feedback Pin Voltage
Output Voltage to Ground
Power Dissipation
Storage Temperature Range
Maximum Junction Temperature
Temperature Range
Supply Voltage
Rating
+45
-0.3 to 25
-0.3V to 25
-1
Internally limited
-65 to +150
+150
-40 to +125
4.5 to 40
Unit
V
V
V
V
W
V
Electrical Characteristics (All Output Voltage Versions)
Symbol
IFB
Parameter
Feedback Bias Current
Conditions
VFB=1.3V
(Adjustable version only)
FOSC
VSAT
DC
ICL
IL
IQ
ISTBY
VIL
Oscillator Frequency
Saturation Voltage
Max. Duty Cycle (ON)
Min. Duty Cycle (OFF)
Current Limit
Output=0
Output=–1
Output
Leakage
Current
Quiescent Current
Standby Quiescent Current
ON/OFF pin Logic Input
IOUT=3A
No outside circuit
VFB=0V force driver on
VFB=0V force driver on
VFB=12V force driver off
Peak current
No outside circuit
VFB=0V force driver on
no outside circuit
VFB=12V force driver off
VIN=40V
VFB=12V force driver off
ON/OFF pin=5V
VIN=40V
Low (regulator ON)
Min.
127
110
3.6
Typ.
40
150
1.3
100
0
4.0
Max.
60
100
173
173
1.4
1.5
5.5
6.5
Unit
nA
KHz
V
%
A
200 uA
2 60 mA
5 10 mA
250
150
300
0.6
μA
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HYM2596
VIH Threshold Voltage
High (regulator OFF)
IH
ON/OFF
Current
Pin
Logic
Input
VLOGIC=2.5V (OFF)
IL ON/OFF Pin Input Current VLOGIC=0.5V (ON)
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2.0 1.3
V
15 25
0.02 5
uA
θJC Thermal Resistance
TO220-5L
TO263-5L
Junction to
Case
2.5
3.5
Thermal Resistance
θJA With Copper area of
Approximately 3 in2
TO220-5L
TO263-5L
Junction to
Ambient
28
/W
23
Electrical Characteristics (Continued)
Symbol Parameter
Conditions
Typ.
Limit
Unit
HYM2596-3.3V
HYM2596-5V
HYM2596-12V
VOUT
η
VOUT
η
VOUT
Output
Voltage
Efficiency
Output
Voltage
Efficiency
Output
Voltage
4.75VVIN40V
0.2AILOAD3A
VIN=12V,ILOAD=3A
4.75VVIN40V
0.2AILOAD3A
VIN=12V,ILOAD=3A
15VIN40V
0.2AILOAD3A
3.3 V
3.168/3.135 VMIN
3.432/3.465 VMAX
73 %
5V
4.8/4.75
VMIN
5.2/5.25
VMAX
80 %
12 V
11.52/11.4
VMIN
12.48/12.6
VMAX
η
VIN=15V,ILOAD=3A
90
%
4.5VVIN40V
1.23
V
HYM2596-ADJ
Output
0.2AILOAD3A
VFB
Feedback VOUT programmed for
1.193/1.18
1.267/1.28
VMIN
VMAX
3V
η
Efficiency
VIN=12V,ILOAD=3A
73
%
Specifications with standard type face are for TJ = 25 OC, and those with boldface type apply over full Operating
Temperature Range.
-4-




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