Cherry Semiconductor CS8126-1YTHE5, CS8126-1YTHA5, CS8126-1YT5, CS8126YDWR16, CS8126YDW16 Datasheet
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■ Low Dropout Voltage
(0.6V at 0.5A)
■ 3% Output Accuracy
■ Active
■ External Delay
for Reset
■ Protection Circuitry
Reverse Battery
Protection
+60V, -50V Peak
Transient Voltage
Short Circuit Protection
Internal Thermal
Overload Protection
RESET
RESET
Features
Package Options
5 L TO-220
7 L D
2
PAK
Tab (Gnd)
Tab (Gnd)
1
CS8126, -1, -2
5V, 750mA Low Dropout Linear Regulator
with Delayed RESET
CS8126,-1,-2
Description
The CS8126 is a low dropout, high current 5V linear regulator. It is an
improved replacement for the CS8156.
Improvements include higher accuracy,
tighter saturation control, better supply
rejection, and enhanced circuitry. Familiar PNP regulator features
such as reverse battery protection, overvoltage shutdown, thermal shutdown,
and current limit make the CS8126 suitable for use in automotive and battery
operated equipment. Additional onchip filtering has been included to
enhance rejection of high frequency
transients on all external leads.
An active microprocessor function is included on-chip with externally
programmable delay time. During
power-up, or after detection of any
error in the regulated output,
the lead will remain in the low
state for the duration of the delay.
Types of errors include short circuit,
low input voltage, overvoltage shutdown, thermal shutdown, or others that
cause the output to become unregulated. This function is independent of the
input voltage and will function correctly with an output voltage as low as 1V.
Hysteresis is included in both the reset
and Delay comparators for enhanced
noise immunity. A latching discharge
circuit is used to discharge the Delay
capacitor, even when triggered by a relatively short fault condition. This circuit
improves upon the commonly used
SCR structure by providing full capacitor discharge (0.2V type).
Note:The CS8126 is lead compatible
with the LM2925, TLE4260, L4947,
LM2927, and LM2926.
RESET
RESET
RESET
Block Diagram
CS8126-1
1V
IN
2V
OUT
3 Gnd
4 Delay
5 RESET
CS8126-2
1V
IN
2 RESET
3 Gnd
4 Delay
5V
OUT
16 Lead SOIC Wide
V
IN
V
OUT
Delay
РРРРРР
RESET
V
OUT(SENSE)
NC
NC
Gnd
NC
NC
NC
NC
NC
NC
NC
NC
A Company
¨
Rev. 5/4/99
1
1V
IN
2V
OUT
3V
OUT(SENSE)
4 Gnd
5 Delay
6 RESET
7NC
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
Over Voltage
Shutdown
V
IN
V
OUT
1
Delay
Gnd
Regulator
Pre-
Charge
Current
Generator
V
Regulated Supply
for Circuit Bias
Latching
Discharge
QRS
-
+
Discharge
Bandgap
Reference
Thermal
Shutdown
Comparator
Reset
Error
Amp
-
+
-
+
Anti-Saturation
and
Current Limit
Delay
Comparator
+
-
RESET
2
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Electrical Characteristics: TA= -40ûC to +125ûC, TJ= -40ûC to +150ûC, VIN= 6 to 26V, IO=5 to 500mA,
R
RESET
= 4.7k½ to V
CC,
unless otherwise noted.
Absolute Maximum Ratings
Power Dissipation.............................................................................................................................................Internally Limited
Peak Transient Voltage (46V Load Dump) .................................................................................................................-50V, 60V
Output Current .................................................................................................................................................Internally Limited
ESD Susceptibility (Human Body Model)..............................................................................................................................4kV
Junction Temperature.............................................................................................................................................-40¡C to 150¡C
Storage Temperature...............................................................................................................................................-55¡C to 150¡C
Lead Temperature Soldering Wave Solder (through hole styles only) ..........................................10 sec. max, 260¡C peak
Reflow (SMD styles only) ..........................................60 sec. max above 183¡C, 230¡C peak
■ Output Stage (V
OUT
)
Output Voltage 4.85 5.00 5.15 V
Dropout Voltage I
OUT
= 500mA 0.35 0.60 V
Supply Current I
OUT
² 10mA 2 7 mA
I
OUT
² 100mA 6 12
I
OUT
² 500mA 55 100
Line Regulation VIN= 6 to 26V, I
OUT
= 50mA 5 50 mV
Load Regulation I
OUT
= 50 to 500mA, VIN= 14V 10 50 mV
Ripple Rejection f = 120Hz, VIN= 7 to 17V, 54 75 dB
I
OUT
= 250mA
Current Limit 0.75 1.20 A
Overvoltage Shutdown 32 40 V
Maximum Line Transient V
OUT
² 5.5V 95 V
Reverse Polarity Input V
OUT
³ -0.6V, 10½ Load -15 -30 V
Voltage DC
Reverse Polarity Input 1% Duty Cycle, T < 100ms, -80 V
Voltage Transient 10½ Load
Thermal Shutdown Guaranteed by Design 150 180 210 ¡C
■ and Delay Functions
Delay Charge Current V
Delay
= 2V 5 10 15 µA
Threshold V
OUT
Increasing, V
RT(ON)
4.65 4.90 V
OUT
- 0.01 V
V
OUT
Decreasing, V
RT(OFF)
4.50 4.70 V
OUT
- 0.15 V
Hysteresis V
RH
= V
RT(ON)
- V
RT(OFF)
150 200 250 mV
Delay Threshold Charge, V
DC(HI)
3.25 3.50 3.75 V
Discharge, V
DC(LO)
2.85 3.10 3.35 V
Delay Hysteresis 200 400 800 mV
Output Voltage Low 1V < V
OUT
< V
RTL
, 3k½ to V
OUT
0.1 0.4 V
Output Leakage V
OUT
> V
RT(ON)
010µA
Current
Delay Capacitor Discharge Latched ÒONÓ, 0.2 0.5 V
Discharge Voltage V
OUT
> V
RT
Delay Time C
Delay
= 0.1µF* (Note 1) 16 32 48 ms
Delay Time = = C
Delay
x 3.2 x 105(typ)
Note 1: assumes ideal capacitor
C
Delay
´ V
Delay
Threshold Charge
I
Charge
RESET
RESET
RESET
RESET
RESET
CS8126, -1, -2
3
Typical Performance Characteristics
V
OUT
vs VINover Temperature
ICQvs. VINover R
LOAD
ICQvs. VINover Temperature
V
OUT
vs. VINover R
LOAD
Package Lead Description
PACKAGE LEAD # LEAD SYMBOL FUNCTION
CS8126, -1, -2
5 Lead TO-220 7Lead 16 Lead
8126-1 8126-2 D2PAK SOIC Wide
11 1 1 V
IN
Unregulated supply voltage to IC.
25 2 16 V
OUT
Regulated 5V output.
3 3 4 11 Gnd Ground connection.
4 4 5 8 Delay Timing capacitor for function.
5 2 6 6 CMOS/TTL compatible output lead. goes low
after detection of any error in the regulated output or
during power up.
314V
OUT(SENSE)
Remote sensing of output voltage.
7 2, 3, 4, 5, 7, 9, NC No Connection.
10, 12, 13, 15
RESETRESET
RESET
55.0
50.0
45.0
40.0
35.0
30.0
25.0
ICQ (mA)
20.0
15.0
10.0
5.0
0.0
5.5
5.0
4.5
4.0
3.5
3.0
(V)
2.5
OUT
V
2.0
1.5
1.0
0.5
0.0
125ûC
0.0
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
125ûC
25ûC
0.0
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
R
25ûC
-40ûC
R
-40ûC
LOAD
VIN (V)
LOAD
VIN (V)
= 25W
= 25W
120.0
110.0
100.0
90.0
80.0
70.0
60.0
50.0
ICQ (mA)
40.0
30.0
20.0
10.0
0.0
5.5
5.0
4.5
4.0
3.5
3.0
(V)
2.5
OUT
V
2.0
1.5
1.0
0.5
0.0
0.0
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
Rload =
NO LOAD
Rload = 10
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
0.0
Room Temp.
VIN (V)
Room Temp.
Rload = 6.67
VIN (V)
R
load
R
= 25
load
R
= NO LOAD
load
R
load
= 10
= 6.67
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