LTC3831 Datasheet, PDF (2/20 Pages) Linear Technology – High Power Synchronous Switching Regulator Controller for DDR Memory Termination

LTC3831
ABSOLUTE AXI U RATI GS
(Note 1)
Supply Voltage
V_CC ....................................................................... 9V
PV_CC1,2 ................................................................ 14V
Input Voltage
I_FB, I_MAX ............................................... – 0.3V to 14V
R⁺, R^–, FB, SHDN, FREQSET ..... – 0.3V to V_CC + 0.3V
Junction Temperature (Note 9) ............................. 125°C
Operating Temperature Range (Note 4) .. – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TG 1
PV_CC1 2
PGND 3
GND 4
R^– 5
FB 6
R⁺ 7
SHDN 8
TOP VIEW
16 BG
15 PV_CC2
14 V_CC
13 I_FB
12 I_MAX
11 FREQSET
10 COMP
9 SS
GN PACKAGE
16-LEAD PLASTIC SSOP
T_JMAX = 125°C, θ_JA = 130°C/ W
ORDER PART
NUMBER
LTC3831EGN
GN PART MARKING
3831
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes specifications that apply over the full operating temperature
range, otherwise specifications are at T_A = 25°C. V_CC, PV_CC1, PV_CC2 = 5V, V_R+ = 2.5V, V_R– = GND, unless otherwise noted. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_CC
PV_CC
V_UVLO
V_FB
∆V_OUT
I_VCC
Supply Voltage
PV_CC1, PV_CC2 Voltage
Undervoltage Lockout Voltage
Feedback Voltage
Output Load Regulation
Output Line Regulation
Supply Current
I_PVCC
PV_CC Supply Current
∆f_OSC
Internal Oscillator Frequency
V_SAWL
V_COMP at Minimum Duty Cycle
V_SAWH
V_COMP at Maximum Duty Cycle
V_COMPMAX
Maximum V_COMP
∆f_OSC/∆I_FREQSET Frequency Adjustment
A_V
Error Amplifier Open-Loop DC Gain
g_m
Error Amplifier Transconductance
I_COMP
Error Amplifier Output Sink/Source Current
I_MAX
I_MAX Sink Current
(Note 7)
V_R+ = 2.5V, V_R– = 0V, V_COMP = 1.25V
I_OUT = 0A to 10A (Note 6)
V_CC = 4.75V to 5.25V
Figure 2, V_SHDN = V_CC
V_SHDN = 0V
Figure 2, V_SHDN = V_CC (Note 3)
V_SHDN = 0V
FREQSET Floating
V_FB = 0V, PV_CC1 = 8V
V_IMAX = V_CC
q3
5
8
V
q3
13.2
V
2.4
2.9
V
q 1.231 1.25 1.269
V
2
mV
0.1
mV
q
0.7
1.6
mA
q
1
10
µA
q
14
20
mA
q
0.1
10
µA
q 160
200
240
kHz
1.2
V
2.2
V
2.85
V
10
kHz/µA
q 46
55
dB
q 520
650
780
µmho
100
µA
9
12
15
µA
q4
12
20
µA
I_MAX Sink Current Tempco
V_IMAX = V_CC (Note 6)
3300
ppm/°C
3831f
2