ADMOS AMS36063 Dc-to-dc converter control circuit Datasheet

Advanced
Monolithic
Systems
AMS36063
DC-TO-DC CONVERTER CONTROL CIRCUIT
PRELIMINARY INFORMATION
FEATURES
APPLICATIONS
• Wide Input Voltage Operating Range from 2.5V to 60V
• Low Standby Current
• Current Limiting
• Output Switch Current of 1.5A
• Output Voltage Adjustable from 1.25 to 40V
• Frequency of Operation to 100kHz
• Thermal Protection
• Enable Input Pin
• Step-Up Converter
• Step-Down Converter
• Voltage Inverting Application
• Telephone Circuits
• Monitors
•Battery Chargers
• Portable Equipment
GENERAL DESCRIPTION
The AMS36063 series is a control circuit containing the basic functions required for DC-to-DC converters. The device consists
of an internal temperature compensated reference, a comparator, a controlled duty cycle oscillator with an active current limit
circuit, a driver, a high current output switch, a thermal protection circuit and a converter enable input. Designed specifically to
be incorporated in Step-Up, Step-Down and Voltage -Inverting applications, the AMS36063 requires a minimum number of
external components.
The AMS36063 is available in the 8-lead plastic SOIC and 8-lead plastic DIP packages.
ORDERING INFORMATION
PACKAGE TYPE
8 LEAD PDIP
AMS36063P
OPER. TEMP
8 LEAD SOIC
AMS36063S
RANGE
-40°C to +85°C
PIN CONNECTIONS
8 LEAD SOIC/ 8 LEAD PDIP
SWITCH
COLLECTOR
SWITCH
EMITTER
TIMING
CAPACITOR
GND
1
8 ENABLE
2
7
3
6 V CC
4
5 COMPARATOR
INVERTING
INPUT
IPK SENSE
Top View
Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS36063
ABSOLUTE MAXIMUM RATINGS (Note 1)
Power Supply Voltage, VCC
60V
Comparator Input Voltage Range, VIR
-0.3V to +60V
Switch Collector Voltage, VC(switch)
60V
Switch Emitter Voltage, VE(switch)
60V
Switch Collector to Emitter Voltage, VCE(switch)
60V
Driver Collector Voltage, VC(driver)
Switch Current, ISW
Power Dissipation
Maximum Junction Temperature
Storage Temperature
60V
1.5A
(Note 3)
+125°C
-65°C to +150°C
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at VCC = 5.0V, -40°C ≤TA ≤+85°C, unless otherwise noted.
PARAMETER
Min.
AMS36063
Typ.
Max.
CONDITIONS
Units
Oscillator
Charging Current
5.0V ≤ VCC ≤ 60V, TA= 25°C
20
35
50
µA
Discharge Current
5.0V ≤ VCC ≤ 60V, TA= 25°C
150
200
250
µA
Voltage Swing
TA= 25°C
0.5
VP-P
Discharge to Charge Current
Ratio
IPK(sense) = VCC, TA= 25°C
6.0
_
Current Limit Sense Voltage
ICHG = IDISCHG, TA= 25°C
250
300
350
mV
Output Switch (Note 2)
Saturation Voltage, Darlington
Connection
ISW = 1.0A, VC(driver) = VC(switch)
1.0
1.3
V
Saturation Voltage
ISW = 1.0A, IC(driver) = 50mA, (Forced β ≈ 20)
0.45
0.7
V
DC Current Gain
ISW = 1.0A, VCE = 5.0V, TA= 25°C
35
120
Collector Off-State Current
VCE = 60V, TA= 25°C
10
nA
Comparator
Threshold Voltage
1.18
Threshold Voltage Line
Regulation
3.0V ≤ VCC ≤ 60V
Input Bias Current
VIN = 0V
1.25
1.32
V
0.04
0.2
mV/V
40
400
nA
2.15
1.90
V
Total Device
ENABLE Low
3.0V ≤ VCC ≤ 60V
ENABLE Low
3.0V ≤ VCC ≤ 60V
Supply Current
5.0V ≤ VCC ≤ 60V, IPK(sense) = VCC ,
CT = 0.001µF, V pin 5 > Vth,
Pin 2 = Gnd, Remaining pins open
2.50
2.26
2.4
V
4.0
mA
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. For guaranteed performance limits and associated test
conditions, see the Electrical Characteristics tables.
Note 2: To minimize power dissipation, low duty cycle pulse testing is used.
Note 3: Power dissipation at TA = 25°C is equal to 1.0W for the 8 lead P DIP package and 625mW for the SO-8 package. For operation at temperatures above
TA = 25°C derate the power dissipation at 10mW/°C.
Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS36063
FUNCTIONAL BLOCK DIAGRAM
ENABLE
1
8
S
Q
Q2
R
Q1
180
IPK SENSE
OSC
VCC
2
SWITCH
EMITTER
3
TIMING
CAPACITOR
CT
6
+
COMP.
-
COMPARATOR
INVERTING
INPUT
170
7
IPK
SWITCH
COLLECTOR
1.25V
REF
REG
5
4
GND
TYPICAL PERFORMANCE CHARACTERISTICS
Standby Supply Current vs
Supply Voltage
1000
3.2
V CC = 5.0V
IPK(sense) = V CC
Pin 5 = GND
SUPPLY CURRENT (mA)
OUTPUT SWITCH ON-OFF TIME (µs)
Output Switch On-Off Time vs
Oscillator Timing Capacitor
100
10
1.0
CT= 0.001 µF
IPK(sense) = V CC
Pin 2 = GND
2.4
1.6
0.8
0
100
0.1
1.0
10
OSCILLATOR TIMING CAPACITOR
0
60
Common-Emitter Configuration
Output Switch Saturation Voltage
vs Collector Current
Emitter-Follower Configuration
Output Switch Saturation Voltage
vs Emitter Current
1.6
1.2
V CC = 5.0V
Pins 1,7 = V CC
Pin 3,5 = GND
1.5
SATURATION VOLTAGE (V)
SATURATION VOLTAGE (V)
5.0 10 20 30 40 50
SUPPLY VOLTAGE (V)
1.4
1.3
1.2
1.1
1.0
VCC = 5.0V
Pin 7 = V CC
Pin 2,3,5 = GND
1.0
Darlington Connection
0.8
0.6
Forced Beta ≈20
0.4
0.2
0
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4
EMITTER CURRENT (A)
Advanced Monolithic Systems, Inc.
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4
COLLECTOR CURRENT (A)
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS36063
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.
8 LEAD SOIC PLASTIC PACKAGE (S)
0.189-0.197*
(4.801-5.004)
8
7
6
5
0.228-0.244
(5.791-6.197)
0.150-0.157**
(3.810-3.988)
1
2
3
4
0.010-0.020
x 45°
(0.254-0.508)
0.053-0.069
(1.346-1.752)
0.004-0.010
(0.101-0.254)
0.014-0.019
(0.355-0.483)
0.008-0.010
(0.203-0.254)
0.050
(1.270)
TYP
0°-8° TYP
0.016-0.050
(0.406-1.270)
S (SO-8 ) AMS DRW# 042293
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
8 LEAD PLASTIC DIP PACKAGE (P)
0.400*
(10.160)
MAX
8
7
6
5
1
2
3
4
0.255±0.015*
(6.477±0.381)
0.045-0.065
(1.143-1.651)
0.300-0.325
(7.620-8.255)
0.130±0.005
(3.302±0.127)
0.065
(1.651)
TYP
0.005
(0.127)
MIN
0.100±0.010
(2.540±0.254)
0.125
(3.175)
MIN
0.009-0.015
(0.229-0.381)
0.015
(0.380)
MIN
0.018±0.003
(0.457±0.076)
0.325 +0.025
-0.015
(8.255 +0.635
-0.381
)
P (8L PDIP ) AMS DRW# 042294
*DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTUSIONS.
MOLD FLASH OR PROTUSIONS SHALL NOT EXCEED 0.010" (0.254mm)
Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
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