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LTC2920-1CS5#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC2920-1/LTC2920-2
1
292012fa
Single/Dual Power Supply
Margining Controller
The LTC
®
2920 allows power supplies and power supply
module output voltages to be precisely adjusted both up
and down for automated PCB testing. The power supply
output voltage is changed by sourcing or sinking current
into the feedback node or voltage adjust pin of the power
supply. This allows a system to test the correct operation
of electrical components at the upper and/or lower power
supply voltage limits specified for a given design (Power
Supply “Margining”).
The LTC2920 uses a single resistor to set the voltage
margining current. The margining current is adjustable
over a 400:1 range. Precision margin currents can be
supplied to within 0.6V of ground or V
CC
.
The LTC2920-1 is a single margining controller. The
LTC2920-2 has two independently controllable margining
channels. Each channel has its own control pin and current
setting resistor. The LTC2920-2 can be used to symmetri-
cally margin two power supplies, or asymmetrically mar-
gin a single power supply.
Both the LTC2920-1 and LTC2920-2 feature a trimmed on-
board voltage reference. Typical power supply margining
accuracy is better than 0.4%.
■
Automated PCB Production Testing
■
Automated Preventative Maintenance Testing
■
DC/DC Converter Module Margining
■
Margin Voltage Precision <0.4%
■
400:1 Current Programming Range
■
Symmetric/Asymmetric High and Low Voltage
Margining
■
Single Control Pin per Supply—High, Float, Low
■
Single Current Setting Resistor per Supply
■
Wide V
CC
Compliance 2.3V < V
CC
< 6V
■
Wide Output Compliance
0.6V < V
MARGIN
< (V
CC
– 0.6V)
■
Single in 5-Pin ThinSOT
TM
(LTC2920-1)
■
Dual in 8-Pin MSOP (LTC2920-2)
POWER ONE
I5S013ZE-A
+V
IN
+V
OUT
–V
OUT
–V
IN
1
2
5
6
TRIM
7
SYSTEM
CONTROLLER
THREE-STATE
LTC2920-1
I
M1
GND
V
CC
R
S1
IN1
R
SET1
10k
1%
2920-1/2 TA01
3.3V
AT 4A
2μF
0.1μF150Ω
33μF
–48V
+
+
3.3V Quarter Brick with ±5% Voltage Margining
5%
+V
OUT
IN1
1ms/DIV 2920-1/2 TA01a
–5%
LOGIC HI
LOGIC FLOAT
LOGIC LOW
NOM
DESCRIPTIO
U
TYPICAL APPLICATIO
U
APPLICATIO S
U
FEATURES
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
LTC2920-1/LTC2920-2
2
292012fa
ORDER PART NUMBER
S5 PART MARKING
T
JMAX
= 125°C, θ
JA
= 250°C/W
LTD7
LTD8
LTC2920-1CS5
LTC2920-1IS5
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, C
RS1
= C
RS2
= 20pF, otherwise specifications are at T
A
= 25°C.
Supply Voltage (V
CC
) ................................–0.3V to 6.5V
Input Voltages
(IN1, IN2, R
S1
, R
S2
)................. –0.3V to (V
CC
+ 0.3V)
Output Voltages (I
M1
, I
M2
) ........... – 0.3V to (V
CC
+ 0.3V)
TOP VIEW
S5 PACKAGE
5-LEAD PLASTIC SOT-23
1
2
3
V
CC
GND
I
M1
5
4
IN1
R
S1
ORDER PART NUMBER
MS8 PART MARKING
LTB6
LTA4
LTC2920-2CMS8
LTC2920-2IMS8
T
JMAX
= 125°C, θ
JA
= 200°C/W
1
2
3
4
R
S2
IN2
IN1
R
S1
8
7
6
5
V
CC
I
M2
GND
I
M1
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
Operating Temperature Range
LTC2920-1C/LTC2920-2C ....................... 0°C to 70°C
LTC2920-1I/LTC2920-2I .................... – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supplies
V
CC
Supply Operating Range (Note 2) ● 2.3 6 V
I
CC(SOURCE)
Supply Current while Sourcing Max I
IM
R
SET1
= R
SET2
= 15k, ● 6mA
IN1 = IN2 < V
IL
I
CC(Q)
Quiescent Supply Current R
SET1
= R
SET2
= 200k, ● 0.23 1 mA
IN1 = IN2 ≤ V
IL
Current Margining Outputs I
M1
, I
M2
I
IMLOW
Low Range I
MARGIN
Current— R
SET1
, R
SET2
Tied to GND, ● 5 167 μA
Sourcing or Sinking IN1, IN2 > V
IH
or IN1, IN2 < V
IL
, (Note 4)
I
IMHIGH
High Range I
MARGIN
Current— R
SET1
, R
SET2
Tied to V
CC
, ● 0.15 2 mA
Sourcing or Sinking IN1, IN2 > V
IH
or IN1, IN2 < V
IL
, (Note 4)
V
M
I
M1
, I
M2
Output Voltage Compliance (Note 3) ● 0.55 V
CC
– 0.55 V
LTC2920-1/LTC2920-2
3
292012fa
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
IMACCURACY
Low Range Current Accuracy 100μA ≤ ⏐I
M
⏐ ≤ 167μA, (Note 6)
C-Grade
● 3 7.5 %
I-Grade
● 313 %
30μA ≤ ⏐I
M
⏐ < 100μA, (Note 6)
C-Grade
● 511 %
I-Grade
● 515 %
5μA ≤ ⏐I
M
⏐ < 30μA, (Note 6)
C-Grade
● 520 %
I-Grade
● 525 %
High Range Current Accuracy 1.5mA ≤ ⏐I
M
⏐ ≤ 2mA, (Note 7)
C-Grade
● 3 7.5 %
I-Grade
● 311 %
600μA ≤ ⏐I
M
⏐ ≤ 1.5mA, (Note 7)
C-Grade
● 511 %
I-Grade
● 515 %
150μA ≤ ⏐I
M
⏐ ≤ 600μA, (Note 7)
C-Grade
● 515 %
I-Grade
● 520 %
I
OZ
I
M1
, I
M2
Leakage Current ● 100 nA
C
IM
Equivalent Capacitance At I
M1
, I
M2
V
IN
= V
OFF
, (Note 5) 10 pF
V
IN
= V
IL
, High Range, (Note 5) 2 nF
V
IN
= V
IL
, Low Range, (Note 5) 30 pF
Control Inputs IN1, IN2
V
IH
Control Voltage for I
M
Current Sinking V
CC
< 2.5V ● 2.1 V
V
CC
≥ 2.5V ● 2.4 V
V
IL
Control Voltage for I
M
Current Sourcing ● 0.6 V
V
OFF
Control Voltage for I
M
Current Off ● 1.1 1.4 V
V
OZ
Control Voltage when Left Floating 1.2 V
R
IN
IN1, IN2 Input Resistance ● 51220kΩ
I
FLT
Maximum Allowed Leakage at IN1, IN2 ● –10 10 μA
for I
M
Current Off
Switching Characteristics
V
IN(DELAYON)
I
M1
, I
M2
Turn-On Time V
IN
Transitions from V
OFF
to ● 15 100 μs
V
IH
or V
IL
V
IN(DELAYOFF)
I
M1
, I
M2
Turn-Off Time V
IN
Transitions from ● 15 100 μs
V
IH
or V
IL
to V
OFF
I
M(ON)
I
M1
Rise Time ⏐I
M
⏐ 5% to 95%, (Note 5) 5 μs
I
M(OFF)
I
M1
Fall Time ⏐I
M
⏐ 95% to 5%, (Note 5) 0.3 μs
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: V
CC
must always be above the maximum of I
M1
and I
M2
less 0.2V.
See Preventing Potential Power Supply Overvoltages in the Applications
Information section.
Note 3: V
M
compliance is the voltage range within which I
M1
and I
M2
are
guaranteed to be sourcing or sinking current. I
M
accuracy will vary within
this range.
Note 4: Consult LTC Marketing for parts specified with wider I
M
current
limits.
Note 5: Determined by design, not production tested.
Note 6:
⏐1 – (I
M
– R
S
)⏐ • 100%; V
CC
≤ 4V: 0.58 ≤ V
M
≤ (V
CC
– 1.1);
V
CC
> 4V: 0.58 ≤ V
M
≤ (V
CC
– 1.4); C
RS
≤ 20pF
Note 7: ⏐1 – (I
M
• R
S
/ 30)⏐ • 100%; 0.79 ≤ V
M
≤ (V
CC
– 0.6);
C
RS
≤ 20pF
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC2920-1CS5#TRPBF

Mfr. #:
Buy LTC2920-1CS5#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Power Management Specialized - PMIC Power Supply Margining Controller
Lifecycle:
New from this manufacturer.
Delivery:
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