AAT2511 AAT, AAT2511 Datasheet
AAT2511
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AAT2511 Summary of contents
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... General Description The AAT2511 is a member of AnalogicTech's Total Power Management IC™ (TPMIC™) product fam- ily comprised of two 1MHz step-down con- verters designed to minimize external component size and cost. The input voltage ranges from 2.7V to 5.5V. The output voltage ranges from 0.6V to the maximum applied input voltage and is externally adjustable ...
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... Exposed paddle (bottom). Use properly sized vias for thermal coupling to the ground plane. See section on PCB layout guidelines. Pin Configuration 2 Dual 600mA, 1MHz Step-Down DC/DC Converter TDFN33-12 (Top View) EN1 VIN1 1 12 FB1 LX1 2 11 SGND1 GND1 3 10 EN2 VIN2 4 9 FB2 LX2 5 8 SGND2 GND2 6 7 AAT2511 2511.2006.02.1.2 ...
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... Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at condi- tions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time. 2. Mounted on an FR4 board with exposed paddle connected to ground plane. 2511.2006.02.1.2 Dual 600mA, 1MHz Step-Down DC/DC Converter 1 2 AAT2511 Value Units 6 0.3 ...
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... EN(H) I Input Low Current EN 1. The AAT2511 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correlation with statistical process controls. 2. For adjustable version with higher than 2.5V output, please consult your AnalogicTech representative. 4 ...
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... Dual 600mA, 1MHz Step-Down DC/DC Converter 3.0 2 3.9V IN 1.0 0.0 -1.0 V -2.0 -3.0 0.1 100 1000 3.0 V 2.0 1.0 0.0 -1.0 -2.0 -3.0 100 1000 0.1 3.0 2.0 1.0 0.0 -1.0 -2.0 -3.0 100 1000 0.1 AAT2511 DC Regulation = 3.3V 10µ µ OUT 100 Output Current (mA) DC Regulation = 2.5V 10µ µ OUT = 100 Output Current (mA) DC Regulation = 1.5V 4.7µ µ OUT V = 4.2V ...
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... Quiescent Current vs. Input Voltage 2.5 3 100 N-Channel R 750 700 650 600 550 500 450 400 25°C 350 300 5.0 5.5 6.0 2.5 3.0 AAT2511 (V = 3.6V 2.5V Temperature (° ° 1.8V) O 85°C 25°C -40°C 3.5 4.0 4.5 5.0 5.5 Input Voltage (V) vs. Input Voltage DS(ON) 120°C 100°C 85° ...
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... Load Transient Response (30mA - 300mA; V 2.65 1.5 2.55 1.3 1.1 2.45 0.9 2.35 0.7 0.5 2.25 0.3 2.15 0.1 -0.1 2.05 2 7.0 6.5 1.5 6.0 1 5.5 0.5 5.0 4.5 0 4.0 -0.5 3.5 -1 3.0 2 0.9 4.0 0.8 3.0 0.7 2.0 0.6 1.0 0.5 0.0 0.4 -1.0 0.3 -2.0 0.2 -3.0 0.1 -4.0 AAT2511 = 2.5V 22µ µ 3.6V OUT 1.5 1.3 1.1 300mA 0.9 30mA 0.7 0.5 0.3 0.1 -0.1 Time (25µs/div) Line Regulation (V = 1.5V) OUT I = 600mA OUT I = 100mA OUT I = 10mA OUT 3.5 4 4.5 5 5.5 Input Voltage (V) Soft Start = 1.5V 4.7µ µ 3.6V; V OUT 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 -0.5 Time (50µs/div ...
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... Note: Internal resistor divider included for ≥1.2V versions. For low voltage versions, the feedback pin is tied directly to the error amplifier input. Operation Device Summary The AAT2511 is a constant frequency peak current mode PWM converter with internal compensation. Each channel has independent input, enable, feed- back, and ground pins with non-synchronized 1MHz clocks ...
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... C1 10µF Figure 1: AAT2511 Adjustable Output with Soft Start The AAT2511 soft-start control prevents output volt- age overshoot and limits inrush current when either the input power or the enable input is applied. When pulled low, the enable input forces the con- verter into a low-power, non-switching state with a bias current of less than 1µ ...
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... The internal slope com- pensation for the adjustable and low-voltage fixed versions of the AAT2511 is 0.24A/µsec. This equates to a slope compensation that is 75% of the inductor current down slope for a 1.5V output and 4.7µ ...
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... Because the AAT2511 channels will generally oper- ate at different duty cycles and are not synchro- nized, the actual ripple will vary and be less than the ripple (V ) used to solve for the input capaci- PP tor in the equation above. Always examine the ceramic capacitor DC voltage coefficient characteristics when selecting the prop- er value. For example, the capacitance of a 10µ ...
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... S ⎛ ⎝ The adjustable version of the AAT2511 in combina- tion with an external feedforward capacitor (C4 and C5 of Figure 1) delivers enhanced transient response for extreme pulsed load applications. The addition of the feedforward capacitor typically requires a larger output capacitor (C1 and C2) for stability ...
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... · · the AAT2511 quiescent current for one chan- Q nel and t is used to estimate the full load switch- sw ing losses. For the condition where channel one is in dropout at 100% duty cycle, the total device dissipation reduces to: ...
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... PK2 O2 2 ⋅ DCR = (0.6A) ⋅ 105mΩ = 38mW Dual 600mA, 1MHz Step-Down DC/DC Converter (see Table 1) ⎛ ⎞ 2.5V ⋅ 100mA ⎝ ⎠ 4.2V (see Table 1) ⎛ ⎞ 1.8V ⋅ 218mA ⎝ ⎠ 4.2V AAT2511 = 300mA LOAD = 300mA LOAD 2511.2006.02.1.2 ...
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... Dual 600mA, 1MHz Step-Down DC/DC Converter = 9µ 2.5V · (4.2V - 2.5V) OUT = · 10µH · 1MHz · 4.2V 2 · 4.2µW = 9µ 1.8V · (4.2V - 1.8V) OUT = · 4.7µH · 1.0MHz · 4.2V 2 · 20µ 15.78µF ⎛ ⎞ 25mV - 5mΩ · 4 · 1MHz ⎝ ⎠ 1.2A AAT2511 = 29mArms = 63mArms 15 ...
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... J(MAX) AMB JA LOSS see Table 3 R4 59.0k GND Figure 2: AAT2511 Evaluation Board Schematic. 1. For enhanced transient configuration C5 100pF and C1 10µF. 16 Dual 600mA, 1MHz Step-Down DC/DC Converter = 2.7V. All values assume an ambient temperature of IN · · (R DSON(LS ...
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... Adjustable Version R2 59kΩ Ω (0.6V device) V (V) OUT 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.8 1.85 2.0 2.5 Figure 3: AAT2511 Evaluation Board Top Side. 1. For reduced quiescent current, R2 and R4 = 221kΩ. 2511.2006.02.1.2 Dual 600mA, 1MHz Step-Down DC/DC Converter R2 221kΩ Ω R1, R3 (kΩ Ω ) R1, R3 (kΩ Ω ) 19.6 75.0 29.4 39.2 49.9 59.0 68.1 78.7 88.7 118 124 137 187 Table 3: Evaluation Board Component Values ...
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... Dual 600mA, 1MHz Step-Down DC/DC Converter Inductance Max DC (µH) Current (A) 4.7 0.90 10 0.55 4.7 0.45 4.7 0.65 4.7 0.65 4.7 1.10 4.7 0.80 4.7 1.53 4.7 1.30 4.7 0.98 4.7 1.77 Value 4.7µF 10uF 22uF Table 5: Surface Mount Capacitors. AAT2511 DCR Size (mm) (Ω Ω ) LxWxH Type 0.11 3.8x3.8x1.8 Shielded 0.21 3.8x3.8x1.8 Shielded 0.20 2.5x3.2x2.0 Non-Shielded 0.15 2.5x3.2x2.0 Non-Shielded 0.15 2.5x3.2x1.55 Non-Shielded 0.20 5.5x6.6x1.0 1mm 0.27 3.3x3.3x1.0 1mm 0.117 4.5x3.6x1.0 1mm Shielded 0.122 5.7x4.4x1.0 1mm Shielded 0 ...
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... Legend Voltage Code Adjustable A (0.6V) 1.2 E 1.5 G 1.6 H 1.8 I 1.9 Y 2.5 N 2.6 O 2.7 P 2.8 Q 2.85 R 2.9 S 3 XYY = assembly and date code. 2. Sample stock is generally held on part numbers listed in BOLD. 2511.2006.02.1.2 Dual 600mA, 1MHz Step-Down DC/DC Converter Marking 1 Channel 2 0.6V QRXYY AAT2511 Part Number (Tape and Reel) AAT2511IWP-AA- ...
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... Dual 600mA, 1MHz Step-Down DC/DC Converter TDFN33-12 Index Area (D/2 x E/2) Detail "B" 1.70 ± 0.05 Bottom View Option A: Option B: C0.30 (4x) max R0.30 (4x) max Chamfered corner Round corner Detail "A" AAT2511 0.3 ± 0.10 0.375 ± 0.125 0.16 0.075 ± 0.075 0.1 REF Pin 1 Indicator (optional) Detail "B" 2511.2006.02.1.2 ...