SC1592IMTRT资料

ICNTL_DIS REG(LINE) REG(CNTL) REG(LOAD)
VCNTL = VIN = 16V V EN = 0 2.5V ≤ VIN ≤ 16V 3.3V ≤ VCNTL ≤ 16V, VOUT = VREF 10mA ≤ IOUT ≤ 2A, TJ = 25°C 10mA ≤ IOUT ≤ 3A, -40 < TJ < 125°C
Pin Descriptions
Pin # DDPAK 1 2 3 Pin # SOIC 1 2, 3 4 Pin Name ILIM IN CNTL Pin Function Externally programmable current limit should be set at < 5A. This is the collector input to the power device. The ouput load current is supplied through this pin. This pin is the bias supply for the control circuitry. The current flow into this pin will be approximately 1% of the output current. For the device to regulate, the voltage on this pin must be at least 1.5V greater than the output voltage, but no less than VCNTL_MIN. Ground. This is the power output of the device. This is a feedback input. Enable input. When high, should be less or equal to VCNTL.
Typical Application Circuit
+3.3V Vcntl
C1 1uF
CNTL
OUT
+1.8V Vout
R2 66.5 C3 47uF(cer)
SC1592
IN EN GND SENSE ILIM
+2.5V Vin
C2 10uF
R3 53
VOUT = (1 + VREF
R2 ) • VREF R3 = 0.8 V typ.
240 • VOUT RLIM
2004 Semtech Corp.
3

SC1592
POWER MANAGEMENT Pin Configurations
Top View TAB
Pin Function 1 2 3 4 5 6 7 TAB ILIM IN CNTL GND OUT SENSE EN GND
TTL
R1 100
Revision: January 27, 2004
1

SC1592
POWER MANAGEMENT Absolute Maximum Ratings
Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied.
SC1592
Features
Wide input range, VIN = 1.25V to 16V,
VCNTL = 3V to 16V 3A Guaranteed Output Current 260mV (typ) @ 3A dropout voltage in dual supply mode 1% Initial Accuracy Adjustable output voltage, down to 0.8V Programmable current limiting and thermal shutdown Fast transient response Excellent line and load regulation Power SO-8 and 7-lead DDPAK
Ordering Information
Part Number SC1592IMTR SC1592IMTRT(3) SC1592ISTR SC1592ISTRT(3) SC1592EVB(2) Evaluation Board SOIC-8L EDP P ackag e
(1)
Temp. Range (TJ) -40°C to +125°C
Low Dropout High Performance Adjustable Positive Voltage Regulator
POWER MANAGEMENT Description
The SC1592 is a 3A low dropout high performance linear voltage regulator, that provides a low voltage, high current output with a minimum of external components, utilizing dual supply configuration. The SC1592 offers a wide input voltage range from 1.25V to 16V and is ideal for applications that need to convert down to 0.8V. Additionally, the SC1592 is fully protected with an externally programmable current limit, and thermal shutdown. Also, there is an EN input which enables or shuts down the device. The SC1592 voltage regulator is available in 7-lead DDPAK and SOIC-8L EDP packages.
Symbol VIN VCNTL IOUT PD θJ A
Maximum 18 18 5 Internally Limited 29 36.5 3 5.5 -40 to +125 -65 to +150 300 2
Units V V A W °C/W
θJ C TJ TSTG TLEAD ESD
°C/W °C °C °C kV
TO-263-7L
(TO-263-7L DDPAK)
Notes: (1) Only available in tape and reel packaging. A reel contains 800 devices for TO-263 package and 2500 devices for SOIC package. (2) When ordering Evaluation Board please specify package needed (TO-263(DDPAK) or SOIC(EDP)). (3) Lead free product.
Applications

Low voltage logic supplies Microprocessor and chipset supplies Split plane microprocessor supplies Advanced graphics cards supplies Sound cards and auxiliary power supplies SMPS post regulator
SC1592
POWER MANAGEMENT Electrical Characteristics (Cont.)
Unless specified: VIN = 2.5V, VEN = VCNTL = 3.3V, VOUT = 1.8V, IOUT = 10mA, RLIM = 100Ω, TJ = TA = 25°C. Values in bold indicate -40°C < TJ < +125°C.
Parameter Thermal Shutdown Thermal Shutdown Hysteresis SENSE Input Current Low Level EN High Level EN EN Input Current EN Impedance Current Limit Accuracy(2)
Parameter Power Input Voltage Control Input Voltage Output Current Power Dissipation Thermal Resistance Junction to Ambient DDPAK (1sq. in.) SOIC-8L EDP (1sq. in.) Thermal Resistance Junction to Case DDPAK SOIC-8L EDP Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering) 10 Sec. ESD Rating (Human Body Model)
Min 3 792
Typ
Max 16
Units V mV mA
800 3 24 1 0.01 0.1 0.8 1.4 160 260
808 8
Control Pin Current in Shutdown VIN Line Regulation VCNTL Line Regulation Load Regulation (1)
Symbol TSHUT
Test s
Min
Typ 150 10 1
Max
Units °C °C µA
0.8 2 VEN = VCNTL = 5V 55 65 ILIM -20 +20 100
V V µA KΩ %
Notes: (1) For load regulation use a 1ms current pulse width, d.c. ≤ 10% when measuring VOUT. (2) Current limit is programmable, ILIM ≈
Parameter Control Voltage Reference Voltage Control Pin Current
Symbol VCNTL VREF ICNTL_EN
Test Conditions VOUT = VREF VOUT = VREF VCNTL = VIN = VEN = 16V VOUT = VREF; IO = 0 VCNTL = VIN = VEN = 16V VOUT = VREF; IO = 3A
5 0.1 0.4 1.5 3 320 520
µA %/V %/V % % mV
Dropout Voltage
V DO
IOUT = 2A; VOUT = 0.98 Vnom IOUT = 3A; VOUT = 0.98 Vnom
2004 Semtech Corp.
2

Electrical Characteristics
Unless specified: VIN = 2.5V, VEN = VCNTL = 3.3V, VOUT = 1.8V, IOUT = 10mA, RLIM = 100Ω, TJ = TA = 25°C. Values in bold indicate -40°C < TJ < +125°C.
Top View
ILIM IN IN CNTL 1 2 3 4 8 7 6 5 EN SENSE OUT OUT EN SENSE OUT OUT
Bottom View
8 7 6 5
Exposed Die Pad
GND ILIM IN IN CNTL
1 2 3 4
(SOIC-8L EDP)
(SOIC-8L EDP)