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LTC1693 High Speed Single/Dual MOSFET Drivers
FEATURES
s s
DESCRIPTIO
s s s s
s s s
Dual MOSFET Drivers in SO-8 Package or Single MOSFET Driver in MSOP Package 1G Electrical Isolation Between the Dual Drivers Permits High/Low Side Gate Drive 1.5A Peak Output Current 16ns Rise/Fall Times at VCC = 12V, CL = 1nF Wide VCC Range: 4.5V to 13.2V CMOS Compatible Inputs with Hysteresis, Input Thresholds are Independent of VCC Driver Input Can Be Driven Above VCC Undervoltage Lockout Thermal Shutdown
The LTC(R)1693 family drives power MOSFETs at high speed. The 1.5A peak output current reduces switching losses in MOSFETs with high gate capacitance. The LTC1693-1 contains two noninverting drivers. The LTC1693-2 contains one noninverting and one inverting driver. The LTC1693-1 and LTC1693-2 drivers are electrically isolated and independent. The LTC1693-3 is a single driver with an output polarity select pin. The LTC1693 has VCC independent CMOS input thresholds with 1.2V of typical hysteresis. The LTC1693 can level-shift the input logic signal up or down to the rail-torail VCC drive for the external MOSFET. The LTC1693 contains an undervoltage lockout circuit and a thermal shutdown circuit. Both circuits disable the external N-channel MOSFET gate drive when activated. The LTC1693-1 and LTC1693-2 come in an 8-lead SO package. The LTC1693-3 comes in an 8-lead MSOP package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s s s s s
Power Supplies High/Low Side Drivers Motor/Relay Control Line Drivers Charge Pumps
TYPICAL APPLICATIO
VIN 48VDC 10% RETURN
Two Transistor Foward Converter
+
C1 330F 63V C2 1.5F 63V
R1 0.068
12V C5 1F 17 C11 0.1F C9 1800pF 5% NPO R5 2.49k 1% 1 2 4 3 5 6 7 10 C10 0.1F C14 3300pF R9 12k C12 100pF 12VIN BOOST LT1339 SYNC 5VREF SL/ADJ CT IAVG SS VC VREF SGND C15 0.1F 8 TS SENSE + SENSE - BG PHASE RUN/SHDN VFB PGND 15 18 11 TG 20 19 BAT54 R6 100 D2 MURS120 LTC1693CS8-2 1 8 VCC1 IN1 2 7 GND1 OUT1 3 6 VCC2 IN2 4 5 GND2 OUT2 C7 1F C8 1F
Q1 MTD20NO6HD
T1 13:2
*
D3 MURS120
Q3 MTD20NO6HD D4 MBRO530T1
12 R7 100 16 14 13 9 R10 10k 1% R8 301k 1% LTC1693CS8-2 1 8 VCC1 IN1 2 7 GND1 OUT1 3 6 IN2 VCC2 4 5 GND2 OUT2 C13 1F
C1: SANYO 63MV330GX C2: WIMA SMD4036/1.5/63/20/TR C6: KEMET T510X477M006AS (x8) L1: GOWANDA 50-318 T1: GOWANDA 50-319
1693 TA01
U
D1 MURS120 L1 1.5H C3 4700pF 25V R2 5.1 Q2 Si4420 x2 VOUT 1.5V/15A C4 0.1F R3 249 1% R4 1.24k 1%
U
U
*
+
Q4 Si4420
C6 470F 6.3V x8
RETURN
1
LTC1693
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltage (VCC) .............................................. 14V Inputs (IN, PHASE) ................................... - 0.3V to 14V Driver Output ................................. - 0.3V to VCC + 0.3V GND1 to GND2 (Note 5) ..................................... 100V
PACKAGE/ORDER INFORMATION
TOP VIEW IN1 1 GND1 2 IN2 3 GND2 4 8 7 6 5 VCC1 OUT1 VCC2 OUT2 IN1 1 GND1 2 IN2 3 GND2 4 TOP VIEW 8 7 6 5 VCC1 OUT1 VCC2 OUT2 IN NC PHASE GND 1 2 3 4 TOP VIEW 8 7 6 5 VCC OUT NC NC
S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150C, JA = 135C/ W
S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150C, JA = 135C/ W
ORDER PART NUMBER LTC1693-1CS8
S8 PART MARKING 16931
ORDER PART NUMBER LTC1693-2CS8
Consult factory for Industrial and Military grade parts.
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VCC = 12V, unless otherwise noted.
SYMBOL PARAMETER VCC ICC ICC(SW) Input VIH VIL IIN VPH IPH Output VOH VOL RONL RONH IPKL IPKH High Output Voltage Low Output Voltage Output Pull-Down Resistance Output Pull-Up Resistance Output Low Peak Current Output High Peak Current IOUT = -10mA IOUT = 10mA
q q
ELECTRICAL CHARACTERISTICS
Supply Voltage Range Quiescent Current Switching Supply Current
CONDITIONS LTC1693-1, LTC1693-2, IN1 = IN2 = 0V (Note 2) LTC1693-3, PHASE = 12V, IN = 0V LTC1693-1, LTC1693-2, COUT = 4.7nF, fIN = 100kHz LTC1693-3, COUT = 4.7nF, fIN = 100kHz
q q q q
High Input Threshold Low Input Threshold Input Pin Bias Current PHASE Pin High Input Threshold PHASE Pin Pull-Up Current (Note 3) PHASE = 0V (Note 3)
2
U
U
W
WW U
W
Junction Temperature .......................................... 150C Operating Ambient Temperature Range ....... 0C to 70C Storage Temperature Range ................. - 65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C
MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 150C, JA = 200C/ W
S8 PART MARKING 16932
ORDER PART NUMBER LTC1693-3CMS8
MS8 PART MARKING LTEB
MIN 4.5 400 200
TYP 720 360 14.4 7.2
MAX 13.2 1100 550 20 10 3.1 1.7 10 6.5 45
UNITS V A A mA mA V V A V A V
q q q q q
2.2 1.1 4.5 10 11.92
2.6 1.4 0.01 5.5 20 11.97 30 2.85 3.00 1.70 1.40
75
mV A A
LTC1693
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VCC = 12V, unless otherwise noted.
SYMBOL PARAMETER Switching Timing (Note 4) tRISE tFALL tPLH tPHL Output Rise Time Output Fall Time Output Low-High Propagation Delay Output High-Low Propagation Delay COUT = 1nF COUT = 4.7nF COUT = 1nF COUT = 4.7nF COUT = 1nF COUT = 4.7nF COUT = 1nF COUT = 4.7nF
q q q q q q q q
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
TYP 17.5 48.0 16.5 42.0 38.0 40.0 32 35
MAX 35 85 35 75 70 75 70 75
UNITS ns ns ns ns ns ns ns ns G
Driver Isolation RISO GND1-GND2 Isolation Resistance LTC1693-1, LTC1693-2 GND1-to-GND2 Voltage = 75V q 0.075 1
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: Supply current is the total current for both drivers. Note 3: Only the LTC1693-3 has a PHASE pin.
Note 4: All AC timing specificatons are guaranteed by design and are not production tested. Note 5: Only applies to the LTC1693-1 and LTC1693-2.
TYPICAL PERFOR A CE CHARACTERISTICS
IN Threshold Voltage vs VCC
2.75 TA = 25C
INPUT THRESHOLD VOLTAGE (V)
INPUT THRESHOLD VOLTAGE (V)
2.50 VIH 2.25 2.00 1.75 1.50 1.25 1.00 5 6 7 9 8 VCC (V) 10 11 12
2.75 2.50 2.25 2.00 1.75 1.50 1.25 1.00 - 50 -25 0 75 50 25 TEMPERATURE (C) VIL VIH
INPUT THRESHOLD HYSTERESIS (V)
VIL
UW
1693 G01
IN Threshold Voltage vs Temperature
3.00 VCC = 12V
1.4 1.3 1.2
IN Threshold Hysteresis vs Temperature
VCC = 12V
VIH-VIL 1.1 1.0 0.9 0.8 - 50
100
125
- 25
0 50 25 75 TEMPERATURE (C)
100
125
1693 G02
1693 G03
3
LTC1693 TYPICAL PERFOR A CE CHARACTERISTICS
PHASE Threshold Voltage vs VCC
6 PHASE THRESHOLD VOLTAGE (V) 5 VPH(H) 4 VPH(L) 3 2 1 0 5 6 7 9 8 VCC (V) 10 11 12 TIME (ns) TA = 25C 24 22 20 18 tFALL 16 14 12 10 5 6 7 9 8 VCC (V) 10 11 12
TIME (ns)
Rise/Fall Time vs COUT
120 TA = 25C VCC = 12V 100 fIN = 100kHz 80
TIME (ns)
TIME (ns)
TIME (ns)
60 40 20 0 1 10 100 COUT (pF) 1000 10000
1693 G07
tRISE tFALL
Propagation Delay vs COUT
50
OUTPUT SATURATION VOLTAGE (mV)
TA = 25C VCC = 12V fIN = 100kHz
150 VOL (50mA) 100
40
QUIESCENT CURRENT (A)
TIME (ns)
tPLH 30
tPHL
20 1 10 100 COUT (pF) 1000 10000
1693 G10
4
UW
1693 G04
Rise/Fall Time vs VCC
TA = 25C COUT = 1nF fIN = 100kHz
20 19 18 17
Rise/Fall Time vs Temperature
VCC = 12V COUT = 1nF fIN = 100kHz tRISE
tRISE
16 15 14 13 12 11 10 -50 -25
tFALL
50 25 0 75 TEMPERATURE (C)
100
125
1693 G05
1693 G06
Propagation Delay vs VCC
55 50 45 40 35 30 25 20 tPHL tPLH TA = 25C COUT = 1nF fIN = 100kHz
Propagation Delay vs Temperature
50 45 40 tPLH 35 tPHL 30 25 VCC = 12V COUT = 1nF fIN = 100kHz
15 10 5 6 7 8 9 VCC (V) 10 11 12
20 - 50 - 25
50 25 75 0 TEMPERATURE (C)
100
125
1693 G08
1693 G09
Output Saturation Voltage vs Temperature
200
350
Quiescent Current vs VCC (Single Driver)
TA = 25C VIN = 0V 300
VCC = 12V VOH (50mA) wrt VCC
250
200
50 VOH (10mA) wrt VCC VOL (10mA) 0 - 55 - 35 -15
150
100
5 25 45 65 85 105 125 TEMPERATURE (C)
1693 G11
5
6
7
9 8 VCC (V)
10
11
12
1693 G12
LTC1693 TYPICAL PERFOR A CE CHARACTERISTICS
Switching Supply Current vs COUT (Single Driver)
100
SWITCHING SUPPLY CURRENT (mA)
90 80 70
TA = 25C VCC = 12V
50 40 30 20 10 0 1 10 100 COUT (pF) 1000 10000
1693 G13
VOL (mV)
60
VOH vs Output Current
350 300 250 TA = 25C VCC = 12V POWER DISSIPATION (mW)
1400 1200 1000
VOH (mV)
200 150 100 50 0 0 10 20 30 40 50 60 70 80 90 100 OUTPUT CURRENT (mA)
1693 G15
UW
VOL vs Output Current
300 250 200 VOL 150 100 50 0 0 10 20 30 40 50 60 70 80 90 100 OUTPUT CURRENT (mA)
1693 G14
VCC = 12V TA = 25C
750kHz
200kHz 100kHz 25kHz
500kHz
Thermal Derating Curves
TJ = 125C
VOH
LTC1693-1/LTC1693-2 800 600 LTC1693-3 400 200 0 - 55 - 35 -15 5 25 45 65 85 105 125 AMBIENT TEMPERATURE (C)
1693 G16
5
LTC1693
PIN FUNCTIONS
SO-8 Package (LTC1693-1, LTC1693-2) IN1, IN2 (Pins 1, 3): Driver Inputs. The inputs have VCC independent thresholds with 1.2V typical hysteresis to improve noise immunity. GND1, GND2 (Pins 2, 4): Driver Grounds. Connect to a low impedance ground. The VCC bypass capacitor should connect directly to this pin. The source of the external MOSFET should also connect directly to the ground pin. This minimizes the AC current path and improves signal integrity. The ground pins should not be tied together if isolation is required between the two drivers of the LTC1693-1 and the LTC1693-2. OUT 1, OUT2 (Pins 5, 7): Driver Outputs. The LTC16931's outputs are in phase with their respective inputs (IN1, IN2). The LTC1693-2's topside driver output (OUT1) is in phase with its input (IN1) and the bottom side driver's output (OUT2) is opposite in phase with respect to its input pin (IN2). VCC1, VCC2 (Pins 6, 8): Power Supply Inputs. MSOP Package (LTC1693-3) IN (Pin 1): Driver Input. The input has VCC independent thresholds with hysteresis to improve noise immunity. NC (Pins 2, 5, 6): No Connect. PHASE (Pin 3): Output Polarity Select. Connect this pin to VCC or leave it floating for noninverting operation. Ground this pin for inverting operation. The typical PHASE pin input current when pulled low is 20A. GND (Pin 4): Driver Ground. Connect to a low impedance ground. The VCC bypass capacitor should connect directly to this pin. The source of the external MOSFET should also connect directly to the ground pin. This minimizes the AC current path and improves signal integrity. OUT (Pin 7): Driver Output. VCC (Pin 8): Power Supply Input.
BLOCK DIAGRA SM
IN1 GND1 IN2 GND2
1 2
3 4
LTC1693-1 DUAL NONINVERTING DRIVER
6
W
U
U
U
8 7 6 5
VCC1 OUT1 VCC2 OUT2 IN2 GND2 IN1 GND1
8 1 2 6 3 4 5 7
VCC1 OUT1 VCC2 OUT2 PHASE NC IN GND
8 1 4 3 2 6 5 7
VCC OUT
NC NC
LTC1693-2 TOPSIDE NONINVERTING DRIVER AND BOTTOM SIDE INVERTING DRIVER
LTC1693-3 SINGLE DRIVER WITH POLARITY SELECT
1693 BD
LTC1693
TEST CIRCUITS
1/2 LTC1693-1 OR 1/2 LTC1693-2 87V
VCC1 8
4.7F 12VP-P 75V 1/2 LTC1693-1 OR 1/2 LTC1693-2 12V 4.7nF
0.1F
1
IN1
OUT1
7
A
2
GND1 VCC2 6
4.7F 4.7nF
0.1F
+ -
75V
3
IN2
OUT2
5
1693 TC03
4
GND2
1693 TC02
75V High Side Switching Test
LTC1693-1, LTC1693-2 Ground Isolation Test
VCC = 12V 4.7F 0.1F
IN 5V
OUT 1nF OR 4.7nF
tRISE/FALL < 10ns
1693 TC01
AC Parameter Measurements
TI I G DIAGRA
W
INPUT RISE/FALL TIME < 10ns INPUT VIH VIL NONINVERTING OUTPUT tr tPLH INVERTING OUTPUT 90% 10% tf tPHL tr tPLH
1693 TD
UW
90% 10% tf tPHL
7
LTC1693
APPLICATIONS INFORMATION
Overview The LTC1693 single and dual drivers allow 3V- or 5V-based digital circuits to drive power MOSFETs at high speeds. A power MOSFET's gate-charge loss increases with switching frequency and transition time. The LTC1693 is capable of driving a 1nF load with a 16ns rise and fall time using a VCC of 12V. This eliminates the need for higher voltage supplies, such as 18V, to reduce the gate charge losses. The LTC1693's 360A quiescent current is an order of magnitude lower than most other drivers/buffers. This improves system efficiency in both standby and switching operation. Since a power MOSFET generally accounts for the majority of power loss in a converter, addition of the LT1693 to a high power converter design greatly improves efficiency, using very little board space. The LTC1693-1 and LTC1693-2 are dual drivers that are electrically isolated. Each driver has independent operation from the other. Drivers may be used in different parts of a system, such as a circuit requiring a floating driver and the second driver being powered with respect to ground. Input Stage The LTC1693 employs 3V CMOS compatible input thresholds that allow a low voltage digital signal to drive standard power MOSFETs. The LTC1693 incorporates a 4V internal regulator to bias the input buffer. This allows the 3V CMOS compatible input thresholds (VIH = 2.6V, VIL = 1.4V) to be independent of variations in VCC. The 1.2V hysteresis between VIH and VIL eliminates false triggering due to ground noise during switching transitions. The LTC1693's input buffer has a high input impedance and draws less than 10A during standby. Output Stage The LTC1693's output stage is essentially a CMOS inverter, as shown by the P- and N-channel MOSFETs in Figure 1 (P1 and N1). The CMOS inverter swings rail-torail, giving maximum voltage drive to the load. This large voltage swing is important in driving external power MOSFETs, whose RDS(ON) is inversely proportional to its gate overdrive voltage (VGS - VT).
VCC V+ LEQ (LOAD INDUCTOR OR STRAY LEAD INDUCTANCE) VDRAIN P1 CGD OUT POWER MOSFET N1 GND
1693 F01
8
U
W
U
U
LTC1693
CGS
Figure 1. Capacitance Seen by OUT During Switching
The LTC1693's output peak currents are 1.4A (P1) and 1.7A (N1) respectively. The N-channel MOSFET (N1) has higher current drive capability so it can discharge the power MOSFET's gate capacitance during high-to-low signal transitions. When the power MOSFET's gate is pulled low by the LTC1693, its drain voltage is pulled high by its load (e.g., a resistor or inductor). The slew rate of the drain voltage causes current to flow back to the MOSFETs gate through its gate-to-drain capacitance. If the MOSFET driver does not have sufficient sink current capability (low output impedance), the current through the power MOSFET's Miller capacitance (CGD) can momentarily pull the gate high, turning the MOSFET back on. Rise/Fall Time Since the power MOSFET generally accounts for the majority of power lost in a converter, it's important to quickly turn it either fully "on" or "off" thereby minimizing the transition time in its linear region. The LTC1693 has rise and fall times on the order of 16ns, delivering about 1.4A to 1.7A of peak current to a 1nF load with a VCC of only 12V. The LTC1693's rise and fall times are determined by the peak current capabilities of P1 and N1. The predriver, shown in Figure 1 driving P1 and N1, uses an adaptive method to minimize cross-conduction currents. This is done with a 6ns nonoverlapping transition time. N1 is fully turned off before P1 is turned-on and vice-versa using this 6ns buffer time. This minimizes any cross-conduction currents while N1 and P1 are switching on and off yet is short enough to not prolong their rise and fall times.
LTC1693
APPLICATIONS INFORMATION
Driver Electrical Isolation The LTC1693-1 and LTC1693-2 incorporate two individual drivers in a single package that can be separately connected to GND and VCC connections. Figure 2 shows a circuit with an LTC1693-2, its top driver left floating while the bottom
LTC1693-2 VCC1 VIN
IN1
OUT1
N1
GND1
*
VCC2 IN2
V+
OUT2
N2
GND2
1693 F02
Figure 2. Simplified LTC1693-2 Floating Driver Application
OTHER PRIMARY-SIDE CIRCUITS
OTHER SECONDARY-SIDE CIRCUITS
*
LTC1693-1 VCC1 V+
*
IN1
OUT1
GND1 VCC2 V+
IN2
OUT2
GND2
1693 F03
Figure 3. Simplified LTC1693-1 Application with Different Ground Potentials
U
W
U
U
driver is powered with respect to ground. Similarly Figure 3 shows a simplified circuit of a LTC1693-1 which is driving MOSFETs with different ground potentials. Because there is 1G of isolation between these drivers in a single package, ground current on the secondary side will not recirculate to the primary side of the circuit. Power Dissipation To ensure proper operation and long term reliability, the LTC1693 must not operate beyond its maximum temperature rating. Package junction temperature can be calculated by: TJ = TA + PD(JA) where: TJ = Junction Temperature TA = Ambient Temperature PD = Power Dissipation JA = Junction-to-Ambient Thermal Resistance Power dissipation consists of standby and switching power losses: PD = PSTDBY + PAC where: PSTDBY = Standby Power Losses PAC = AC Switching Losses The LTC1693 consumes very little current during standby. This DC power loss per driver at VCC = 12V is only (360A)(12V) = 4.32mW. AC switching losses are made up of the output capacitive load losses and the transition state losses. The capactive load losses are primarily due to the large AC currents needed to charge and discharge the load capacitance during switching. Load losses for the CMOS driver driving a pure capacitive load COUT will be: Load Capacitive Power (COUT) = (COUT)(f)(VCC)2 The power MOSFET's gate capacitance seen by the driver output varies with its VGS voltage level during switching. A power MOSFET's capacitive load power dissipation can be calculated by its gate charge factor, QG. The QG value
9
LTC1693
APPLICATIONS INFORMATION
corresponding to MOSFET's VGS value (VCC in this case) can be readily obtained from the manafacturer's QGS vs VGS curves: Load Capacitive Power (MOS) = (VCC)(QG)(f) Transition state power losses are due to both AC currents required to charge and discharge the drivers' internal nodal capacitances and cross-conduction currents in the internal gates. UVLO and Thermal Shutdown The LTC1693's UVLO detector disables the input buffer and pulls the output pin to ground if VCC < 4V. The output remains off from VCC = 1V to VCC = 4V. This ensures that during start-up or improper supply voltage values, the LTC1693 will keep the output power MOSFET off. The LTC1693 also has a thermal detector that similarly disables the input buffer and grounds the output pin if junction temperature exceeds 145C. The thermal shutdown circuit has 20C of hysteresis. This thermal limit helps to shut down the system should a fault condition occur. Input Voltage Range LTC1693's input pin is a high impedance node and essentially draws neligible input current. This simplifies the input drive circuitry required for the input. The LTC1693 typically has 1.2V of hysteresis between its low and high input thresholds. This increases the driver's robustness against any ground bounce noises. However, care should still be taken to keep this pin from any noise pickup, especially in high frequency switching applications. In applications where the input signal swings below the GND pin potential, the input pin voltage must be clamped to prevent the LTC1693's parastic substrate diode from turning on. This can be accomplished by connecting a series current limiting resistor R1 and a shunting Schottky diode D1 to the input pin (Figure 4). R1 ranges from 100 to 470 while D1 can be a BAT54 or 1N5818/9.
GND INPUT SIGNAL GOING BEL0W GND PIN POTENTIAL R1 IN VCC
10
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LTC1693
D1
PARASITIC SUBSTRATE DIODE
1693 F04
Figure 4
Bypassing and Grounding LTC1693 requires proper VCC bypassing and grounding due to its high speed switching (ns) and large AC currents (A). Careless component placement and PCB trace routing may cause excessive ringing and under/overshoot. To obtain the optimum performance from the LTC1693: A. Mount the bypass capacitors as close as possible to the VCC and GND pins. The leads should be shortened as much as possible to reduce lead inductance. It is recommended to have a 0.1F ceramic in parallel with a low ESR 4.7F bypass capacitor. For high voltage switching in an inductive environment, ensure that the bypass capacitors' VMAX ratings are high enough to prevent breakdown. This is especially important for floating driver applications. B. Use a low inductance, low impedance ground plane to reduce any ground drop and stray capacitance. Remember that the LTC1693 switches 1.5A peak currents and any significant ground drop will degrade signal integrity. C. Plan the ground routing carefully. Know where the large load switching current is coming from and going to. Maintain separate ground return paths for the input pin and output pin. Terminate these two ground traces only at the GND pin of the driver (STAR network). D. Keep the copper trace between the driver output pin and the load short and wide.
SLIC Power Supply
D6 12V 500mW
D4 MBR1100 1 4
TYPICAL APPLICATIONS
GND CA3 220F 35V
T1E NOT USED T1B 123H 33T #30 CA1 220F 35V
CA2 220F 35V
*
R10 32k 1% C12 0.1F X7R
L1 100H
10 5 R3 0.010 3 D5 MUR120 8 1 6 R7 1k 5% U4 LT1006S8 7 2 U2 LTC1266A 1 TDRIVE BDRIVE PGND LBOUT LBIN SGND SHDN VFB SENSE + C5 1nF 9 Q1 IRL2505 10 11 RX1 24 1/2W 12 CB1 120F 63V C10 0.1F 50V CB2 120F 63V 13 C6 1nF 50V 14 T1C 33T #30 + 7 15 2 PWR VIN 2 3 PINV BINH VIN CT ITH SENSE - 4 5 6 7 8 R2 100 16 R5 100 T1A 9.2H 9T 4x #26
- 24V 240mA
VIN 5V
+
* *6
Q3 MTD2N20
+
C7 0.1F 25V
*8 T1D 33T #30 9
C11 120pF 5% NPO
C4 0.1F U1 LTC1693-2 1 IN1 GND1 IN2 GND2 OUT2 5 C3 0.1F C2 0.33F + VIN D2 MMSD4148 VCC2 6 C8 0.1F 16V 6 C1 100pF R1 10k D3 MMSD4148 OUT1 7 2 3 4 VCC1 8
R4 43k RF1 2.49k 1% RF2 47.5k 1% - 24V 7 1 C9 10nF 50V U3 LT1006S8
C12 1nF 5%
-
8
2
R6 1.2k
3
T1: PHILIPS EFD25-3C85 FIRST WIND T1B, T1C AND T1D TRIFILAR SECOND WIND T1A QUADFILAR AIR GAP: 0.88mm OR 2 x 0.44mm SPACERS
4
+
+
+V1
-
GND
CIN2 330F 6.3V
+
CIN1 330F 6.3V
RF3 24.3k 0.1%
C11 0.1F 100V
3
4
R8 10k 1%
R9 4.99k C13 10nF 100V
RF4 46.4k 0.1%
CB3 39F 100V
1693 TA03
- 70V 200mA
U
*
*
+
+
+
+
LTC1693
11
LTC1693
TYPICAL APPLICATIONS
Negative-to-Positive Synchronous Boost Converter
VOUT 3.3V 6A
L2** 1H
VS
+
C3 330F 6.3V x2
+
C2 330F 6.3V x5
+
C1 330F 6.3V x5
VIN -5V
R6 10
2 3
SENSE - SENSE - PWR VIN PINV BINH VIN CT ITH 7 12 15 U1 LTC1266 TDRV BDRV LBI SHDN LBO SGND PGND VFB 10
+
C6 10F 16V
4 5 6
C5 0.1F
C7 390pF C9 0.015F C8 1500pF
R7 1k
12
U
9
D2 MBRO530 D1 MBRS130 Q2 Si4420 x2 6 5 U2B LTC1693-2 4 3
R5 2.2 R1 0.015 1W R2 0.015 1W R3 100 L1* 4.8H C12 4700pF
C13 0.1F
+
C14 10F 16V D4 MBRO530
R19 1k C17 100pF
C11 4700pF Q1 Si4420 x2
D3 MBRO530 8 7 U2A LTC1693-2 2 1 C15 0.1F
D5 MBRO530 Q6 2N3904
R16 3.6k
R4 2.2
+
C16 10F 16V
R14 51
R15 1.2k
C4 1000pF
8 1 16 13 11 14 R8 30.1k R10 100k R11 100k Q4 2N3906 Q3 2N7002 *PANASONIC ETQPAF4R8HA **COILCRAFT DO3316P-102 Q5 2N3906 R17 6.81k 3.3V R18 6.81k VS
C10 220pF
R9 13k
R12 4.75k
R13 1.30k
1693 TA03
Multiple Output Telecom Power Supply
Q4 FZT694B + V1 QO1 Si9803 LO1 1H
D3 MMSD4148 RF1 42.2k 1% R9 1M D7 BAV21
C3 0.1F 100V
R2 22
C4 1nF 50V Q1 2N5401
*
TYPICAL APPLICATIONS
5V 0.8A
T1A 3T 12 #28
2 T1B 1T #28
D8 BAV21
D6 3.3V 500mW LO2 2.2H
GND U2 LTC1266A 11
+
*
1 TDRIVE BDRIVE 16
+
*
2 3 PINV LBOUT LBIN 13 4 PWR VIN PGND 14 15 3 T1C 2T #28 10 DO3 MBRM140
- VIN -24V TO - 35V
CIN1 220F 50V
CIN2 220F 50V QO2 Si9803
T1F 7 32T #28 50H 6
3.3V 0.3A LO3 2.2H
BINH
+
CO2A 330F 6.3V
+
+
CO3A 330F 6.3V
+
CO2B 330F 6.3V
2.5V 0.3A CO3B 330F 6.3V
+ V1 6 7 CT SHDN 10 VIN 11 SGND
5 Q2 IRF620
12
R11 12.1k
C7 0.1F 25V
4 T1D 3T #28 9 DO4 MBRM140
R7 4.7
8 SENSE - 8 C2 0.1F + V1 R3 0.1 8 7 6 5 RX1 120 1/2W C5 1nF T1E 9T #28
ITH
C11 120pF 5% NPO
9 SENSE +
VFB
R5 100
CX1 220pF 50V
5
5V R8 1k Q3 2N2222
CC1 10nF
CC2 100pF 5% U1 LTC1693-1 1 IN1 GND1 IN2 GND2 OUT2 VCC2 OUT1 2 3 4 VCC1
RCL 6.8k
+
CO4 220F 25V
R6 10 D9 5.6V 0.5W
C9 1nF
D10 1N4148
R4 390
C6 100pF NPO
C11 0.1F 100V
CO4B 0.1F 16V
- 5V 30mA
1693 TA04
T1 TRANSFORMER COILTRONICS VP4-TYPE
WINDING # TURNS AWG T1A 3 28 T1B 1 28 T1C 2 28 T1D 3 28 T1E 9 28 T1F 32 28
T1 WINDING ORDER: 1. T1A, T1B, T1C, T1D QUAD-FILAR, WOUND FIRST, AFTER T1A, T1B, T1C AND T1D WOUND, REMOVE 2 TURNS FROM T1B AND 1 TURN FROM T1C 2. T1E WOUND ON TOP, SPREAD EVENLY 3. LAYER OF INSULATION 4. T1F WOUND ON TOP, SPREAD EVENLY
T1 CORE: COILTRONICS VP4-TYPE, AIR GAP, 0.7mm or 2 x 0.35mm SPACERS PRIMARY INDUCTANCE OF T1F = 50H ALTERNATIVE CORES: SIEMENS EFD20, N67 MATERIAL, TDK PC40-EPC17
U
R1 47k
D1 6.2V 500mW
+
C1 220F 16V D2 MMSD4148 1
+
CO1A 330F 6.3V
+
CO1B 330F 6.3V
* * *
LTC1693
13
48V to 5V Isolated Synchronous Forward DC/DC Converter
+VIN 10 47 +VOUT FMMT718 T1 W1 10 SUD30N04-10 MURS120 W5 LTC1693-1 4 3 8 1 IN1 GND1 W3 4.7k BAT54 3 T2 1 4.7k BAT54 470 GND2 GND1 4 2 1F IN1 OUT1 7 W4 4.7nF IN2 OUT2 5 VCC1 VCC2 4.7F 25V MMFT3904 8 6 3.1V FMMT718 P 2.2F 10 0.025 1/2W 470 2 VCC1 OUT1 LTC1693-1 FZT600 7 IN2 OUT2 10 T2 470 5 4.7nF GND2 VCC2 6 2k 0.47F 50V IRF1310NS SUD30N04-10 C3, C4, C5: SANYO OS-CON -VOUT 10 BAS21 W4 1nF -VOUT 1nF SEC HV 12V 10 IRF1310NS +VOUT SEC HV 4.8H PANASONIC ETQP AF4R8H
LTC1693
TYPICAL APPLICATIONS
INPUT 36V TO 75V
C1 1.2F 100V CER
C2 1.2F 100V CER
P
MURS120
-VIN
0.22F
MMBD914LT1 20 1F T2 W1 19 18 11 12 P BG VFB 9 16 3.3 3 470 2 4
1k
+VOUT
+VIN
VBOOST
SENSE +
SENSE -
COMP
RTOP
12VIN LT1339 RUN/SHDN
V+
36k
TG
TS
17
3.01k 1% 1 COLL REF 8
1k 0.01F
100k
13
SYNC
5VREF
14
CT
SL/ADJ
IAVG
VREF
SGND
PGND
SS
GND-F
GND-S
13k 4.53k 2.2nF 1F 2.2nF 4.7nF 0.1F
100k
1
2
3
4
5
10
8 15
6
7
CNY17-3
RMID
0.1F
VC
PHASE
100k
6
5
7 LT1431CS8 2.4k 95
9.31k 1%
4.42k 1%
SHORT JP1 FOR 5VOUT
+
68F 20V AVX TSPE
3.9k
-VOUT
T2 ER11/5 CORE AI = 960H T1 W3 W1, 10T 32AWG, W2, 15T 32AWG T1 PHILIPS EFD20-3F3 CORE LP = 720H (AI = 1800) W5, 10T 2 x 26AWG W4, 7T 6 x 26AWG W1, 18T BIFILAR 31AWG W3, 6T BIFILAR 31AWG W1, 10T 2 x 26AWG 2MIL POLY FILM W3, 10T 32AWG, W4, 10T 32AWG 2MIL POLY FILM
P 36VIN 90 48VIN 72VIN 85
COILCRAFT DO1608-105 JP2 JP3 W2
BAS21
BAS21
5VOUT SHORT JP3, OPEN JP2 3.3VOUT, SHORT JP2, OPEN JP3
P
EFFICIENCY
10k
BAS21
0
1
2
8
9
10
1693 TA10
34567 OUTPUT CURRENT
U
14
+
C4 330F 6.3V C5 330F 6.3V OUTPUT 5V/10A
0.1F
T2
MMBD914LT1
W2 2.2F
470
C3 330F 6.3V
+
+
BAT54
+VIN
+VIN
LTC1693
TYPICAL APPLICATIONS
5V to 12V Boost Converter
INDUCTOR PEAK CURRENT 600mA R2, C1 SET THE OSCILLATION FREQUENCY AT 200kHz R1 SETS THE DUTY CYCLE AT 45% EFFICIENCY 80% AT 50mA LOAD *SUMIDA CDRH125-220
Output Voltage
18 VCC = 5V 50mA LOAD 16 OUTPUT VOLTAGE (V) 14 12 10 8 6 100 VCC = 5V 50mA LOAD 90
EFFICIENCY (%)
35
40
45 50 55 DUTY CYCLE (%)
U
D1 BAT85
R2 13k 1%
R1 7.5k 1%
VCC = 5V
C2 0.1F 8 1 C1 680pF
+
C3 4.7F
L1* D2 22H 1N5819 Q1 BS170
LTC1693-3 3 4
7
VOUT 12V 50mA CL 47F
+
1693 TA06a
Efficiency
80
70
60
60
65
50
10
11
12 13 14 OUTPUT VOLTAGE (V)
15
16
1693 TA06b
1693 TA06c
15
LTC1693
TYPICAL APPLICATIONS
Charge Pump Doubler
Output Voltage
12 VCC = 5V 10 80
EFFICIENCY (%)
OUTPUT VOLTAGE (V)
8 6 4 2 0 0 10 20 30 40 50 60 70 80 90 100 OUTPUT CURRENT (mA)
1693 TA07b
16
U
R1 11k 1% C2 1F 8 1 C1 680pF LTC1693-3 3 4 7 VCC = 5V
VCC = 5V D1 1N5817 D2 1N5817
C3 1F
+
VOUT CL 47F
1693 TA07a
R1, C1 SET THE OSCILLATION FREQUENCY AT 150kHz AND THE DUTY CYCLE AT 35%
Efficiency
100 VCC = 5V
60
40
20
0
0
10 20 30 40 50 60 70 80 90 100 OUTPUT CURRENT (mA)
1693 TA07c
LTC1693
TYPICAL APPLICATIONS
Charge Pump Inverter
D1 1N5817
R1, C1 SET THE OSCILLATION FREQUENCY AT 150kHz AND THE DUTY CYCLE AT 35%
Output Voltage
0 VCC = 5V -1
OUTPUT VOLTAGE (V)
100 VCC = 5V 80
EFFICIENCY (%)
-2 -3 -4 -5 -6 0 10 20 30 40 50 60 70 80 90 100 OUTPUT CURRENT (mA)
1693 TA08b
60
40
20
0
+
U
R1 11k 1% C2 1F 8 1 C1 680pF LTC1693-3 3 4 7 CL 47F VCC = 5V
C3 1F
D2 1N5817 VOUT
1693 TA08a
Efficiency
0
10 20 30 40 50 60 70 80 90 100 OUTPUT CURRENT (mA)
1693 TA08c
17
LTC1693
TYPICAL APPLICATIONS
Charge Pump Tripler
C1 680pF
R1, C1 SET THE OSCILLATION FREQUENCY AT 150kHz AND THE DUTY CYCLE AT 35%
Output Voltage
18 16 14 90 VCC = 5V 80 70
OUTPUT VOLTAGE (V)
EFFICIENCY (%)
12 10 8 6 4 2 0 0 10 20 30 40 50 60 70 80 90 100 OUTPUT CURRENT (mA)
1693 TA09b
18
U
1
R1 11k 1% C2 1F 8 LTC1693-3 3 4 7 VCC = 5V
VCC = 5V D1 1N5817 D2 1N5817
C3 1F
D3 1N5817
D4 1N5817
C5 1F
+
C4 3.3F
+
VOUT CL 47F
1693 TA09a
Efficiency
VCC = 5V
60 50 40 30 20 10 0 0 10 20 30 40 50 60 70 80 90 100 OUTPUT CURRENT (mA)
1693 TA09c
LTC1693
PACKAGE DESCRIPTION
0.007 (0.18) 0.021 0.006 (0.53 0.015)
* DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
0.010 - 0.020 x 45 (0.254 - 0.508) 0.008 - 0.010 (0.203 - 0.254) 0- 8 TYP
0.016 - 0.050 0.406 - 1.270
*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
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
U
Dimensions in inches (millimeters) unless otherwise noted.
MS8 Package 8-Lead Plastic MSOP
(LTC DWG # 05-08-1660)
0.118 0.004* (3.00 0.102) 8 76 5
0.192 0.004 (4.88 0.10)
0.118 0.004** (3.00 0.102)
1 0.040 0.006 (1.02 0.15) 0 - 6 TYP SEATING PLANE 0.012 (0.30) 0.0256 REF (0.65) TYP
23
4 0.034 0.004 (0.86 0.102)
0.006 0.004 (0.15 0.102)
MSOP (MS8) 1197
S8 Package 8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
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 0.053 - 0.069 (1.346 - 1.752)
2
3
4
0.004 - 0.010 (0.101 - 0.254)
0.014 - 0.019 (0.355 - 0.483)
0.050 (1.270) TYP
SO8 0996
19
LTC1693
TYPICAL APPLICATION
Push-Pull Converter
VCC = 5V T1A 24T #32 C6 330F 6.3V T1B 1 24T #32 2 T1C 3 24T #32 4 T1D 24T #32 1* 2 R3 10 C7 2.2nF 100V
R1 6.2k VCC = 5V C2 0.1F 14 13 C1 390pF 74HC14 7 12 11 12 C3 0.1F
VCC = 5V C4 1F 1 10 14 PRESET 13 2 9 8 3 6 LTC1693-2 4 5 Q2 Si4410 Q Q GND 7
74HC74 D
Output Voltage
14 12
100
VCC = 5V
90 80
EFFICIENCY (%)
OUTPUT VOLTAGE (V)
10 8 6 4 2 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 OUTPUT CURRENT (A)
1693 F05b
RELATED PARTS
PART NUMBER LTC1154 LTC1155 LTC1156 LTC1157 LT(R)1160/LT1162 LT1161 LTC1163 LT1339 LTC1435 DESCRIPTION High Side Micropower MOSFET Drivers Dual Micropower High/Low Side Drivers with Internal Charge Pump Dual Micropower High/Low Side Drivers with Internal Charge Pump 3.3V Dual Micropower High/Low Side Driver Half/Full Bridge N-Channel Power MOSFET Driver Quad Protected High Side MOSFET Driver Triple 1.8V to 6V High Side MOSFET Driver High Power Synchronous DC/DC Controller High Efficiency, Low Noise Current Mode Step-Down DC/DC Controller COMMENTS Internal Charge Pump, 4.5V to 48V Supply Range, tON = 80s, tOFF = 28s 4.5V to 18V Supply Range 4.5V to 18V Supply Range 3.3V or 5V Supply Range Dual Driver with Topside Floating Driver, 10V to 15V Supply Range 8V to 48V Supply Range, tON = 200s, tOFF = 28s 1.8V to 6V Supply Range, tON = 95s, tOFF = 45s Current Mode Operation Up to 60V, Dual N-Channel Synchronous Drive 3.5V to 36V Operation with Ultrahigh Efficiency, Dual N-Channel MOSFET Synchronous Drive
1693f LT/TP 0499 4K * PRINTED IN USA
20
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX: (408) 434-0507 q www.linear-tech.com
U
+
*
* 9 T1E
24T 8 #28
D1 MBR340
L1 1H
8 LTC1693-2 7 Q1 Si4410 R2 10 C5 2.2nF 100V x2
*
* 9 T1F
24T 8 #28 D2 MBR340
+
C9 270F 25V x3
VOUT 12V 1A
3* 4 R4 10
CLR
C8 2.2nF 100V
T1: PHILIPS CPHS-EFD20-1S-10P FIRST WIND T1A AND T1C BIFILAR, THEN WIND T1E AND T1F BIFILAR, THEN WIND T1B AND T1D BIFILAR
1693 F05a
Efficiency
VCC = 5V
70 60 50 40 30 20 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 OUTPUT CURRENT (A)
1693 F05c
(c) LINEAR TECHNOLOGY CORPORATION 1999

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